Best way to clean shower and shower doors

If you are talking about a glass shower and glass shower doors this should help:

https://oceanglasscompany.com/shower-maintenance.html

https://www.hometalk.com/categories/clean/bathroom/showers

Get a spray bottle & fill it with 1/2 C. Apple Cider Vinegar, 1/2 C. Dawn Ultimate, 1/2 C. Rubbing Alcohol & water. Shake to mix & spray on. Clean with paper towels. Cloth will leave streaks & lint behind. If they're rusty or cruddy, pour some Coca-Cola over them & let them soak for a couple of hours. Take a butter knife & scrape them first, then clean with the above formula.

Always squeegee after each and every shower to remove water marks. Then spray with vinegar and water mixed in spray bottle and use newspaper which wont leave any lint behind. If you keep up with this process you will always have a clean shower.

CLR spray

Everyone has a favorite, but I use Barkeeper's in the spray bottle. Spray, lightly sponge it, rinse....voila! Best of luck.

Fill a spray bottle with a 50/50 solution of Dawn dish soap and vinegar. Spray it on the shower doors and let it work. If they are tougher stains, you may have to scrub with a plastic scrubber!