Acrylic bathtub is mainly made of the acrylic layer ( surface layer)、inner layer and glass fiber reinforced resin composite layer,namely it’s a kind of plastic ,with advantages as  light-weight, high gloss, easy molding, temperature resistance and chemical resistance, and here we have following small tips for your reference in the daily cleaning and maintenance :
1.Cleaning and sanitizing acrylic bathroom regularly,we friendly suggest once a week,even you don’t use it very often.
2.Using a sponge or lint instead of coarse cloth and scouring pad.
3.Do not use any detergent that contains granular object.
4.Using gentle cleaning agent such as dish washing liquid or glass water instead of grind cleaner. 
5.Keeping it away of direct sunlight.