On fabric straps, use a prewash remover or bar soap and warm water if the fabric allows it. On leather, brush, wipe lightly and test first.
The cotton shoulder strap of your tote has gone dark and slightly stiff where it rests on your neck, and the handles of a leather bag look dull and greasy.
For a washable fabric strap, ACI says to use a prewash stain remover or rub with bar soap and then launder in the hottest water that is safe for the fabric. For leather handles, the conservation guidance points to gentle dry cleaning methods and a test first.
What the sources say
- ACI’s advice for perspiration is to use a prewash stain remover or rub the area with bar soap, then launder using the hottest water safe for the fabric.
- ACI notes that stubborn perspiration stains may respond to an enzyme product or oxygen bleach in the hottest safe water.
- UGA Extension has a page on perspiration stains for washable fabrics.
- The Canadian Conservation Institute says that salts from perspiration during use can form a crystalline deposit on leather that may look like mould, and it describes gentle surface cleaning with a soft brush or an eraser after a test.
What to do
- Check the strap’s material and the care label, if there is one.
- On a removable fabric strap, rub bar soap into the damp mark and rinse.
- If the strap cannot come off, use a damp cloth and a little soap, and blot dry.
- On leather, use a soft brush for dust and test an eraser on a hidden spot before using it.
- Let it dry flat in the air, away from heat.
Where this answer stops
The stain advice is written for washable clothing and the leather note for museum objects. A leather handle with a painted edge or a dye can mark easily, so be cautious. This is general information only.
Sources and further reading
Three more perspectives
Rotate bags and shoulders. A strap that always rests in the same place collects the most salt and oil, and a day off lets the material dry out.
Check what the strap is made of. Cotton webbing, nylon and leather each need a different approach, and a bag sold with leather handles on a fabric body needs care at the join.
Clean a fabric strap early, as soon as it looks dull. A pale mark takes much less effort than a dark band that has built up over a year.
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