The shower pan is the tray floor of your shower. Many pans are textured and seem to attract dirt. Just like a bathtub, plastic shower pans collect soap scum. To keep the shower pan clean, you need only a few items and a little time.
Cleaning A Dirty Plastic Shower Pan
Spray a dry shower floor with WD-40 and let it soak in for a few minutes.
Scrub the floor with a scrubbing brush. A dish-scrubbing brush will be fine for this project.
Rinse the shower pan floor with warm water. The floor will be slippery.
Sprinkle the entire shower pan floor with baking soda. Scrub the floor, using the soda and warm water. Keep scrubbing until the floor is no longer slick.
Maintenance Cleaning A Plastic Shower Pan
Fill a spray bottle with undiluted white vinegar.
Spray the plastic shower pan floor with undiluted white vinegar.
Wipe the floor with a damp sponge.