Best Product for your shower. Spray directly on stains and all over the surface of your shower and tub, let sit for about 15 minutes (WARNING: since this product has bleach, make sure you leave your fan in the bathroom on so the fumes do get to you and overpower your house!), when you return, all the stains will be gone. No scrubing necessary! Just rince the surfaces off with water and youre all done!