"The only thing I've found that works on my shower floor is comet, a scrubber of some sort and some elbow grease. " LOL
These are great ideas... All of them. I ended up spraying the shower stall with scrubbing bubbles, I had a can and then scrubbing with a green scrubber pad and then the bottom, Ajax or whatever it is in the green can. It worked.
I just had getting in the shower and cleaning! Hate it. I really can't use those chemical type cleansers that spray for you and stay in cause my DD still baths and it just seems like too much chemical, I could be wrong.
Anyway... Elbow grease is best, but I am going to try the baking soda idea as soon as I run out of the store bought.
Henry Ward Beecher wrote, "It is not what we take up, but what we give up, that makes us rich."