Shower Cleaner?

Use a spray cleaner safe for plastic or fiberglass like Scrubbing Bubbles. For the textured bottom of the shower, I use Magic Eraser.

I use Fantastic. Use it in the shower and on my boat.

I have a rectangular scrub brush, probably 3" x 5", with a threaded hole that takes a wooden pole about 4' long. I wet the walls and floor down with the shower head, shoot some liquid Soft Scrub on the walls and floor, scrub, then rinse with the shower head. With the pole, you don't have to be in the shower to scrub it.

Same stuff we use at home. Any kind of spray bathroom cleaner as long as it is not an abrasive powder.
(actually, I have no clue what the exact brand is, my wife does...:B)