Spotted a spot on fabric, but have no idea what it is or how it got there? Try blotting it with cool water. If that doesn’t work, blot a wet sponge sprinkled with a few drops of vinegar or ammonia and rinse. NOTE: don’t try this with cotton or linen fabrics – instead, blot the stain with rubbing alcohol diluted with an equal amount of water before rinsing. For white fabrics, try sponging with a solution of one part bleach and four parts water, then launder as usual.