Tile Cleanser Best Way To Clean Tile And Grout In Shower...tried Everything Nothing Works!?

Best way to clean tile and grout in shower...tried everything nothing works!? - tile cleanser

I have tried everything to clean my shower ... straight bleach, Scrubbing Bubbles, Orange Clean, Zap!, Kaboom, Simple Green, Tilex, Comet, Comet, and the new gel spray things. Faded Comet Bathroom Cleaner new image and has a good job, but my pictures are not clean and bright white. Ugh! Please help .... What works? Is there something that is not toxic and does not contain a lot of smoke and my bathroom with no windows and Comet cleaner used, which I had a headache!