I use an air purifier that has UV-C light. I've been using it since Dec 2015 to prevent mold after we had a flood. I haven't had to use mold/mildew removers in any of the showers ever since. It even completely destroys all pet odors including from litter boxes. Also, I'll move it down to the kitchen if I'm going to make chorizo or fish or anything that normally lingers in the air. Supposedly it deystroys odors from cigarette smoke too, but I can't say for sure since I don't smoke.
It's the OION LB-7001