This is the shower that my husband uses. I am — voluntarily — in charge of cleaning the fiberglass shower base (Swanstone). I am not very diligent about it. Obviously. Historically, I have used Lysol Basin Tub & Tile cleaner liquid in the spray bottle. It has “worked”, but it always took me like three applications, lots of letting it sit and soak, then wiping up over and over with a rag. It took forever and still there were always bits of scum left in the anti skid pattern of the fiberglass shower pan. Then the darn dirt would start building up again, fast and furious. So, you can see why I avoided the task: It was sisyphean.
But ha!, disgusting fiberglass days are over!
When I bought a special cream cleanser — ROG1 — to clean the bathtub’s slip resistant bottom — which worked like a dream, I also received a second, general purpose solution — ROG3 — that said it would clean fiberglass. So I gave it a try and Yowza: This fiberglass shower pan also cleaned up like a dream — faster and better than anything I have ever tried before.
What did I use to clean the fiberglass? The ROG3 — the bottle of blue solution on the right. It said on the instructions that it could be used for fiberglass. So I tried it. My process:
source: How to clean a fiberglass shower base to look like NEW — my best product find yet — Retro Renovation