Spray the surface with white vinegar
Let it sit for 10 to 15 minutes
Scrub with a non-scratch sponge or brush
Rinse with warm water
Mix baking soda with water to make a paste
Apply the paste to stubborn soap scum
Scrub gently and rinse thoroughly
Use a commercial soap scum remover if needed
Wipe the surface dry with a microfiber cloth
Repeat regularly to prevent buildup