How To Clean Soap Scum Off Fiberglass Shower Walls. Spray a little bit of the cleaner on a small area of your shower door, then wipe this may seem like a chore to do in the short term, but it's much easier to squeegee your shower door after you shower than it is to clean off soap scum that's. Rinse the fiberglass thoroughly with water.
Prevent soap scum by towel drying your shower after each use.
The first thing you should do before attempting to remove soap scum from shower surfaces is to take a nice, long, hot shower. Not only will it take away the white dingy. The first thing you should do before attempting to remove soap scum from shower surfaces is to take a nice, long, hot shower. Unless your showers are strictly conversation pieces, you will eventually notice soap scum forming on the floor of the shower.