I use Clorox Cleaner + Bleach spray. I wipe the room down from end to end, lights, fans, ext... Basically everything. I recently started using Green Clean to combat and as a preventive for WPM. It's expensive but came highly recommended from a few large scale growers i know. I'm in the north east and humidity runs rampant during the warm months. I will try anything to try and stay ahead of it. It also works for spider, broad and russet mites.