How do I get sweat stains out of a white mousepad?

Soak it in OxiClean and warm water for an hour, then rinse. Bleach is risky—it can yellow white fabrics or damage the printed surface. For tough spots, make a paste of OxiClean and water, rub it in, let it sit 15 minutes, then soak. Rinse thoroughly, blot dry with a towel, and air dry flat.