I had one and we had a problem with the water, there was rust in it and the water company was going to replace the tub because the rust was their fault. I happend to love orange oil to polish furniture. I had a bottle of orange juice it was the kind on the grocery shelf not in the refrigerator section. I decided to dump the bottle of OJ in the tub with the stopper in and I took and rag and made sure all the walls were soaked. It was a 1 piece tub and walls. I let it sit for about a 1/2 hour then hosed the walls and filled the tub with HOT water leaving the OJ in it. I left that sit for awhile and then drained it low and behole the tub looked brand new. I kid you not. All the texture on the bottom was cleaned too. After that the ONLY thing I used and still use the tub in this house is acrylic is Comet spray tub and tile cleaner. Spray it on let it sit and rinse it clean. No bending or scrubbing.