Clean shower and bath with shampoo / shower gel
Dirt marks in shower tray and bathtub are often made of skin fat. The gentlest kind of cleaning (thus particularly suitable for Acry tubs) consists of using the cleaning agent for skin and hair:
Shampoo or shower gel works wonders!
Just after a shower / bath a thick blob of it on a damp cotton washcloth and einhampooniert the tub! Rinse everything and you're done!
I do this with my shower tray whenever the shampoo bottle gets empty. The tub looks perfectly clean.
