It is very difficult to keep clean. The polish helps but still the Shower floor which has ridges never looks completely clean. How To Clean A Plastic Shower Pan Hunker Fiberglass Shower Fiberglass Shower Pan Shower Pan Before you look at the photo below you have to promise not to judge me. How to clean plastic shower pan . I have tried many products and polishes. If you have any empty or worn-out items throw them away. Apply the paste onto the shower floor and use a scrub brush or a cleaning tooth brush to scrub the paste into the textured grooves. Ive tried bleach Comet Magic Eraser degreaser you name it. Builder installed a plastic or fibreglass shower pan. If you have a shower. Step 1 Mix together your favorite laundry detergent with a small amount of dishwashing liquid. I scrubbed with my Dobie. In this video I will show you my natural chemicals free way to clean your textured fiberglass or plastic shower floor and make it white and clean again usin. ...