Mildew spots on clothes: can they be removed?

What the black or grey dots are

Mildew is a mould, a fungus that grows on fabric that has stayed damp in still air. It feeds on cotton, linen, viscose and silk, and on the starch, food traces and body oils left in clothes put away unwashed. It shows first as a musty smell, then as pin-sized grey, black or greenish specks, often in clusters along folds and seams. The specks are both growth and pigment, which is why brushing removes some of it and leaves a shadow behind.

White cotton and lawn

Plain white cotton gives you the most options. Chlorine bleach is for plain white cotton only, and only where the label’s triangle symbol permits it; our guide to care label symbols shows what to look for. Dilute it as the bottle says and never mix it with vinegar, ammonia or any other cleaner. Avoid it on white suits with coloured embroidery or contrast piping. The gentler sequence is:

• Brush it off outdoors while the fabric is dry, so the spores do not settle on other clothes or furnishings.
• Wash it at the warmest temperature the label allows, with your usual detergent.
• Soak what remains in an oxygen-based bleach solution mixed as the pack directs, then wash again.
• Dry it in direct sun, which helps bleach the last traces on plain white cotton.
• Repeat before giving up. A second or third round often shifts what the first did not.

Prints, colours, silk and embellished pieces

Colour and delicate fibres narrow the options, because whatever lifts mildew pigment can lift dye as well. Our stain removal guide sets out the same safe rules for other marks: cold water first, blot, test, and no heat until the stain has gone.

• Printed and coloured cottons: brush, wash, then try a colour-safe oxygen bleach after testing an inside seam. Skip long sun-bleaching, which fades the print along with the mildew.
• Viscose: treat as coloured cotton but handle it gently, because it is weak when wet.
• Silk and wool: brush lightly outdoors, air the piece and take it to a dry cleaner. Both oxygen and chlorine bleach can damage these fibres.
• Velvet, zari and embroidered pieces: air and brush only, then dry clean. Tell the cleaner it is mildew.

Stopping it spreading through the wardrobe

One spotted kameez usually means the conditions are right for more, so deal with the space as well as the garment. Our storage guide explains how to set a wardrobe up, and getting a musty smell out of stored clothes covers the stage before spots appear.

• Take out everything that touched the affected piece and wash or air it.
• Empty the wardrobe, vacuum it, and wipe the inside with a cloth wrung out in mild detergent solution. Leave the doors open until it is bone dry.
• Look for the cause: a cold outside wall, a leak, a wardrobe packed too tightly, or clothes put away slightly damp.
• Swap plastic covers for cotton ones, leave space between hangers and add a moisture absorber.
• Check the suitcase or box the clothes were stored in, and dry it in the open air.

If the marks will not shift

Old mildew can leave permanent shadows and thin, weak patches that tear when rubbed, so stop treating once the fabric starts to feel fragile. A tailor near you who can see the piece may be able to replace a marked panel; repairs and alterations to existing clothes are not something we offer. If you would rather replace the outfit, custom stitching explains how a new one is made to your measurements, and you can ask for a quote.