Prep first
Before you start
- Blot the spot with a clean white cloth or paper towel, not a colored one.
- Rinse the area with cool water, never hot.
- Keep the item out of the dryer and away from the iron.
- Test any cleaner on a hidden seam first.
A stiff, faint patch on clothes is usually soap that never fully rinsed out, and hard water is part of the reason it formed. It clings because it's a film rather than a spill, so a quick rinse usually won't lift it. Fresh marks are much simpler to lift than old ones, and heat from a dryer or iron can lock the film in, so keep the item away from both until the spot is gone.
Check dark fabric in daylight before you wash it, since pale soap marks are easy to miss indoors. On white clothes, an enzyme pretreater is a solid pick for a stubborn mark, and an oxygen bleach powder can follow if needed. If a shirt still shows the mark after one wash, pretreat it again rather than putting it in the dryer.
Before you start
What clothes can take
Safe to use3
- Water
- Soaking
- Enzyme cleaners
Use with care6
- Hot water
- Chlorine bleach
- Oxygen bleach
- Solvents (alcohol, spot removers)
- Acids (vinegar, lemon)
- Scrubbing and abrasives
Avoid1
- Heat, once the stain is out
7 items
What you'll need
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- Clean white cloth or paper towelFor blotting, since colored cloths can bleed dye. (opens Amazon)
- Dull knifeTo scrape off solids without digging into the fabric.
- Cold waterFor the first soak, since hot water can set an unknown stain.
- Liquid laundry detergentFor working into the stain and for the wash. (opens Amazon)
- Enzyme laundry presoakFor the overnight soak if the stain remains. (opens Amazon)
- All-fabric (oxygen) bleachFor a second treatment on colorfast fabric only. (opens Amazon)
- Rust removerOnly if you suspect rust, used before any bleach. (opens Amazon)
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6 steps
Step by step
Step 1 of 6
Blot and scrape off the excess
Lay the garment flat and blot the spot with a clean white cloth or paper towel, pressing rather than rubbing. Use a dull knife to gently scrape off any solids, working from the edges toward the center. Keep colored cloths and sponges away from it, since they can bleed dye.
Step 2 of 6
Check the label and test a hidden seam
Check the care label first. If it says dry-clean only, don't treat it at home. Take the item to a dry cleaner promptly.
If it's washable, test whatever cleaner you plan to use on a hidden seam or hem. Did the color change, or did the fabric get damaged? Then don't use that product on the stain.
Tip. If the care label is missing, don't guess at the fabric. Stick to the cold soak and the detergent wash only.
Step 3 of 630 minutes
Soak the spot in cold water
Put the stained area, or the whole item, in cold water and leave it about 30 minutes. You don't know yet what the stain is made of, so cold is the safe place to begin. Don't let the water warm up, and don't rinse the spot until you get to the detergent step.
Careful. Hot water can set protein stains such as milk, egg or blood, so keep the water cold on an unidentified stain.
Step 4 of 630 minutes
Work in detergent, then wash
Work a little liquid laundry detergent into the stain with your fingers, then leave it about 30 minutes. Rinse the spot, then wash the item in liquid detergent using the warmest water the care label allows, which may be lukewarm or hot. Rinse fully and let it air-dry.
Step 5 of 6
Overnight enzyme presoak if it remains
If the stain is still visible after the wash and air-dry, soak the item overnight in an enzyme laundry presoak, following the product's directions. Rinse it out, then wash again the same way as before. Check the spot before anything else goes on, and only move on if it's still there.
Step 6 of 6
Oxygen bleach for a faint mark
If a faint mark remains, use an all-fabric (oxygen) bleach that has passed a colorfastness test on the item. If you suspect rust, use a rust remover before any bleach. Work the bleach into the spot, rinse fully, and wash again.
Careful. Bleach should never be used at full strength, so dilute it or follow the product's directions exactly.
If you'd rather buy than mix
Best products for soap scum on clothes
Look for a liquid laundry detergent, an enzyme laundry presoak and an all-fabric (oxygen) bleach labeled for colorfast fabrics.
Shout Triple-Acting Laundry Stain Remover
Puracy Laundry Stain Remover
Clorox 2 Laundry Stain Remover and Color Booster Powder, 49.2 Ounces
How we picked these: each product is made for this type of stain, its maker doesn't warn against using it on clothes, and its directions fit the steps above.
Finished the steps? How does it look?
Nice work. Let it dry completely and check it again in good light before using any heat. Here is what done looks like:
How to tell it's really gone →A faint mark usually needs one more round, not a stronger product.
Heavy buildup usually takes more than one round.
Heavy or long-standing buildup →When to call a professional →How to tell it's working
The spot should look lighter after each wash, and the fabric should feel clean where the film was. If it hasn't changed after a full wash, move on to the next treatment rather than repeating the same one.
What changes for yours
Adjust for your clothes
White clothes
On white fabric the same steps apply, and you can go a little further if the spot won't lift. The chlorine bleach option in the set-in section is open to white items, but only if the label allows it and a hidden-seam test shows no damage.
Check the spot in good light after each wash so you know when to stop. Rinse fully before trying any chlorine bleach, since it only comes last.
A shirt
A shirt often picks up soap on the collar, cuffs and front placket, so inspect those areas as well as the stained patch. Work from the wrong side of the fabric so the film doesn't spread through the front.
Try the detergent first on the inside of the hem, where a mark won't show. Lay the shirt flat while you work so the wet area doesn't spread.
Blue soap
Blue soap stains are treated with the same steps, but the colored mark needs extra checking because the color can move. Test the detergent and any bleach on a hidden seam before using them on the blue spot.
If the blue color lightens or spreads to the surrounding fabric during the cold soak or the wash, stop there and skip the bleach and presoak. Rinse with cool water and let the item air-dry.
Liquid soap
Liquid soap is wet when it lands, so the first move is to blot it up before anything else. Press the excess up with a clean white cloth, working from the outside edge toward the center.
Once the excess is lifted, go straight to the cold soak and then the detergent wash, since the rest of the steps are the same.
Black or dark clothes
Dark fabric shows a soap film clearly, but the color is what needs the most caution. Use only a clean white cloth or paper towel for blotting, since colored cloths and sponges can bleed dye onto black fabric.
Before any oxygen bleach, test the item's colorfastness on a hidden seam, and don't use it if the color changes. Chlorine bleach is not an option unless the label allows it and the item is colorfast.
Heavy or long-standing buildup
Soap stains that have been sitting are tougher than fresh ones. Often they need a second round, not a stronger product. Put the spot back in cold water, then repeat the detergent wash before you go on to the enzyme presoak.
Dried stains can be loosened the same way. Scrape off any crusty residue first, and don't rub it in.
If the item went through the dryer, the heat has probably set the stain, so plan for another round of presoak and oxygen bleach. A few marks may never fully lift. That's normal and doesn't mean you did anything wrong.
Still there after the presoak and oxygen bleach? Next up is a pretreatment spray or dry-cleaning solvent, applied from the wrong side with the spot technique.
Only leave it on for the time the directions give, and rinse it out well before doing anything else. Chlorine bleach is the last resort. Dilute it following the package directions, use it only on colorfast items whose label allows it, and never put it on wool, silk, mohair, leather or spandex.
Vinegar, baking soda, peroxide and more
Do home remedies work on soap scum on clothes?
Several home remedies come up for soap stains, but most of them belong to other stains or other surfaces. A cold soak and liquid laundry detergent are what fit soap film on fabric.
Works1Skip5
Chemical safety
Never mix these
Some products in this guide react dangerously with each other. Use them one at a time and rinse with water in between.
Chlorine bleach + Oxygen bleach (OxiClean)
Both makers advise against combining them: OxiClean says not to mix it with chlorine bleach, and Clorox says the two bleaches cancel each other out.
If they mix by accident: Don't use the mixture; ventilate the room and avoid breathing fumes or touching it; call Poison Control at 1-800-222-1222 for disposal advice or if anyone feels unwell.
What makes it worse
Mistakes to avoid
Don't rub in bar soap
Never rub a fresh stain with bar soap, since soap sets many stains. Use liquid laundry detergent as the steps describe, and blot rather than rubbing hard.
Don't dry or iron it until it's gone
Heat sets the stain and may make it impossible to remove. Check the spot after air-drying, and keep the item out of the dryer and away from the iron until the stain is gone.
Don't mix your removers
Never mix bleach with other cleaners, including vinegar, ammonia, toilet bowl cleaners or acidic scale removers. Ammonia and chlorine bleach make toxic fumes, so rinse thoroughly between removers.
Don't leave a pretreatment on too long
Liquid and aerosol pretreatments should come off when the directions say, and gels on bright or fluorescent items should come off after a few minutes. Unstable dyes can change color or fade if you leave them on longer.
When to call a professional
Got a dry-clean-only item? Get it to a professional cleaner promptly and say what the fiber is and what the stain is. Washable items can go as well when the stain is large, the item is bulky or the fabric is fragile.
Questions
Is hand soap a problem for fabric?
Yes, hand soap can leave a film that clings, especially if it wasn't rinsed out. Don't rub the bar on the spot, since bar soap sets many stains. Start with a cold soak and a liquid laundry detergent wash, then move on to the presoak only if a mark remains.
How can you prevent a film from forming?
Rinse clothes thoroughly after washing so no detergent residue is left behind. If your water is hard, a water softener removes the hardness minerals that form soap film, which helps over time. Keep bar soap off fabric, and treat any mark quickly.
Will a car wash product leave a mark?
It can leave a soap film, and the same steps apply: blot, cold soak and liquid laundry detergent. The exact product is unknown, so test the cleaner on a hidden seam first and stop if the color changes.
Can heat make a film permanent?
Yes, soap can leave a film that clings to fabric, and it's easier to lift while it's fresh. Heat from an iron or dryer sets it, so skip both until the stain is gone.
Can a mark that has dried still lift?
It can be done, but a dried mark takes more rounds than a fresh one. Scrape off any crusted residue, soak in cold water, then repeat the detergent wash and the overnight enzyme presoak.
Is bleach safe on dark items?
Only if the item is colorfast and the label allows it. Test a hidden seam first, and use oxygen bleach before any chlorine bleach, since chlorine is the last option.
Do the same steps work for rags?
Yes. Cloths and rags follow the same order: blot, cold soak, detergent wash, then the presoak if a mark remains. Rinse soap is handled the same way, since it's still a soap film.
Soap Scum on other materials
Other stains on clothes
Start from the bigger picture
How we know this
Every method, amount and warning here comes from university extension services, industry bodies and product makers. We read them, check every step for unsafe combinations and changed amounts, and write it up so you can follow it.