It is only natural that mildew or film will form each time you take a shower. The deposition may take place on the doors and the curtains of the bathroom space as well. In order to avoid it you should get the area cleaned each time with a dry towel. However, just wiping the area will not be enough.
It is still important that the area is cleaned properly. In order to keep the materials of the bathtub protected, it is very important that you choose cleaners that are recommended by the manufacturers. The cleaners that are not suitable may erode the skin of the bathtub. The cleaners that have no acetate content are generally preferred for cleaning the bathtubs. These are the things that have to be kept in mind when you are trying to get your bathtub cleaned. Make sure you clean the area regularly.