My husband and I buy repo houses. This last one had a large, textured bottom tub that was really nasty. I used several dryer sheets and my long handled, new toilet bowl brush to try and save the tub. I wet my dryer sheet, put it over the end of the brush (so I could reach across that big tub) and scrubbed. It was amazing how clean that tub came out so we didn't have the expense of installing a new tub.