How can I clean my glass shower door?

Plain old white vinegar! Give that a try. And use a squeegee.

This might help

https://www.hometalk.com/diy/clean/bathroom/how-to-clean-glass-shower-doors-quick-and-easy-15594504

I love Mr Clean Magic Erasers they work great

I use a magic eraser i just wipe them down before I get out and they are always crystal clear

Hello. I have hard water issues.

Im considering the Rain X products for shower door care and maintenance. We have extremely hard water.

https://www.rainx.com/product/for-the-home/rain-x-shower-door-x-treme-clean/#.Wlf8WyROmf0

https://www.rainx.com/product/for-the-home/rain-x-shower-door-water-repellent/#.Wlf88SROmf0

Get rid of grime on the interior of your glass shower door by following these simple steps:

1. Mix one part vinegar with two parts distilled water in an empty spray bottle and shake well.
2. Spray the surface of the shower door with the solution and let it work its magic for 10 minutes.
3. Use a microfiber sponge to wipe away the grime. If you see streaks once the door has dried, use your microfiber cloth to buff them out in a circular motion.