Our bathroom dirt cleaner contains disodium EDTA, sodium bicarbonate, lauryl ether 7. It effectively removes stubborn stains from bathtubs, tiles, shower heads, and glass, making them clean and shiny again in minutes. Its use method is very simple: 1. Spray the appropriate amount of this product on the desired place in the bathroom. 2. Rub the stain back and forth with a sponge until it is cleaned again. Wipe off any excess residue with a clean cloth. Effectively removes hard water stains, soap residue and other dirt to give your bathroom a fresh look.