Clean your bathrooms regularly
No matter how effective cleaning products are, regular maintenance is the real key to cleaning bathrooms. Of course , if you combine this habit with good disinfectants such as vinegar and baking soda, you will avoid the formation of limescale stains.

Borax is also a good cleaner that acts as a softener against hard water. However, it is advisable to protect yourself with rubber gloves before use.
Do not hesitate to use natural and ecological products to clean the cup without exposing yourself to the effects of chemicals.