How do I get rid of mold in the bathroom?

Well ventilated areas do not have mold. Your best bet is to cure the problem, add a fan (or replace an existing older one), add a window (or open it when showering), add heat lights to the ceiling to dry out the tub/shower. I have used Clorox spray cleaner with bleach to clean up the mold (wear a mask, open a window, use the fan.)

https://www.hometalk.com/diy/clean/bathroom/the-best-way-to-remove-mold-mildew-with-2-ingredients-no-bleach-33077514

X-14 cleaner or bleach

Vinegar! Also think about better ventilation, even a portable fan can help.

http://restorationmasterfinder.com/restoration/what-kills-mold-bleach-vs-vinegar/

https://www.networx.com/article/bleach-vs-vinegar-mold-removal

Back in the "olden days" before all these cleaning products were invented, they used vinegar. Environmentally friendly and not toxic to children and pets.

The best cheapest way is Hydrogen peroxide ...but you need to f the source or it will come back no matter what you do

i'm no fan of bleach, it wont kill the mold spores- the things that spread the the mold.- i had better luck with half vinegar and half water in a spray bottle and soaked the mold spots. mold is opportunistic...it needs a source of food, a bit of water, and prefers the dark. keep a full spectrum light bulb on, remove all sources of food and water. ie clean daily.

I keep a spray bottle of vinegar for cleaning. If you like a citrus smell, you can soak orange or lemon peels in vinegar in a sealed jar for a few days. Then pour the liquid into a spray bottle. I do a ration of half water to half vinegar since it is really strong.