A bathtub mat, which is usually made of rubber, prevents slipping in the bath. After repeated use, a mat commonly becomes dirty from soap residue and hard water, and requires cleaning. Several household products provide non-toxic ways to clean carpets bathtub and restore to their original condition. One of them is the vinegar.
Hard water contains lime and mineral deposits that can stain a bathtub mat over time. Vinegar is an excellent way to remove these stains from the carpet as disinfect. Place a cup of vinegar (or enough to cover your carpet) in the microwave for 30 seconds or long enough to heat it.
Place the pad in a sink with a drain closed. Pour vinegar on the table, and let it soak for about an hour. Rub the carpet thoroughly with a brush to remove stubborn stains, and then rinse the carpet with clean, warm water. Now, the bathtub mat is clean and new looks.