How can I clean fiberglass bathtub?

Hi Pattyne, hope this helps: https://www.hunker.com/12126351/how-to-clean-and-restore-shine-to-a-fiberglass-tub

I like to use one cup warm white vinegar and one cup dish soap in a spray bottle. Spray all over the tub; let sit for at least one hour. I find it cleans easily after the vinegar has sat for so long. Good luck!

Gel Gloss is made for fiberglass tubs to restore the shine. or you can use auto wax (carnuba) to polish it..... just make sure you have a mat or non-slip strips on the bottom as it will be slippery. I use Dollar Tree Awesome Orange in the half gallon to clean bathroom tubs including fiberglass..... it gets anything off.

Spray easyoff oven cleaner, let it sit an hour then wipe off. Great for soap scum buildup

I’m with Lee....spray oven cleaner. Works great on fiberglass.