I primarily use them in the bathroom to kill off mold and bacteria about once every 3 months. I open up the water heater closet, drawers, etc... then I fire one of them up. I've used them in other places but the more they are used the more I have to vent the house.

Has anything prompted you to do this? Have you been doing this for a long time? Have you noticed any changes (yes, I assume?!). Sorry for pelting you with questions, but this is so... interesting and I'm tempted to give it a shot.