Sweat soaks into bed linens and can leave yellowish stains. You can remove the stains with vinegar, which cuts through the sweat. It also aids in odour removal. Use vinegar each wash cycle to avoid sweat build-up. The vinegar won't harm the other materials in the washing machine; it will actually help brighten colours and remove dirt.
Remove the linens from the bed. Place the linens on a flat surface.
Fill the spray bottle with white distilled vinegar. Screw on the lid. Turn the spray nozzle to the "On" position.
Spray the sweat stains until they are soaked. Let the vinegar sit for 20 minutes. If the sheet dries, respray.
Put the linens in the washing machine. Add detergent. Do not add bleach. The combination of vinegar and bleach creates harmful fumes.
Wash the sheets with hot water. Check the care label when you wash pillows or comforters for special instructions.
Remove the clean sheets. Check for the stains. If the stains still exist, treat with the vinegar and wash again. Dry as normal when the stains have been removed.