We recommend using a non-abrasive cleaner, such as Lysol Tub & Tile Cleaner (without bleach) or Fantastik (without bleach). How you maintain your tub is the most important way to get the 15 plus year life out of your newly reglazed tub. Since the new finish has a very high gloss surface, there is no need to use abrasive cleaners, and in fact, abrasives or the wrong cleaner can be detrimental to your new surface.
Always use a soft sponge or towel when cleaning the tub, and never use a scouring pad or something similar as this would scratch and wear away the finish over time and compromise the finish. I would recommend using the two cleaners listed above. If you can not find these cleaners or you are not sure that your cleaner is ok, give me a call. I know for fact that the above cleaners will not damage the finish as I personally have used these on my reglazed items in my own home for over 8 years now. Any other cleaners may void the warranty. The above mentioned cleaners should be available at your local grocery or hardware store.
Note: DO NOT Clean Your Reglazed Bathtub with Paint Thinner, Goof OFF, Scrubbing Bubbles, Acetone, Lacquer Thinner, M.E.K.  or other chemicals that attack the structural integrity of plastics (which includes acrylic urethanes which the reglazed tub is made of) (including, but not limited to, acetones). Use of these chemicals will destroy the acrylic surface of your bathtub and there is no way to reverse the damage caused by this type of chemical reaction. Use of these chemicals will void your warranty.