Would like to make my old fiberglass shower look c lean and new again

I read people use a can of oven cleaner on their fiberglass showers. Easy Off in the blue can is recommended.

http://homeguides.sfgate.com/make-old-fiberglass-shower-stalls-look-new-105774.html

Mogie5757 has got it. That is what I always recommend.

You might want to do what we did. We got a Turbo Hurricane scrubber online and it is powerful and cleans everything from showers to floors in hard to reach areas like behind the commode to tires. It comes with an extension handle too. You can buy them now at Walmart and probably other stores. I have seen them at Walmart. They are great and work their weight in gold!

we use vinegar and magic eraser...and elbow grease! good luck :)