What can I use that's the easiest to get rid of mold in shouwer tiles

I use Clorox spray bleach on my tiles.

Vinegar! And try to improve the ventilation in the room, even a portable fan will work.

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

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

Just clean, Dry and paint them with gloss paint.

Hi Tina, use Bi Carb of Soda. Mix some into a past on a saucer, useing @ soft tooth brush, gentley scrub the tiles, till mold comes away, then rine and dry off. Depending on how long, the mold has been there, you may need to repeat the process. You can allso use White Vinigar to, with or without Bi Carb of Soda. I use Bi Carb of Soda and White Vinigar for all my cleaning needs. Bi Card of Soda is very effective on bath tubs, pus it is @ non harsh natural abrasive, making it safe to use on most surfaces. Keep smiling Kay Adelaide Australia 😎