Meant to share this months ago. Met an old time indoor grower and i was telling him how my PC got mites. Told me to get a small coffee jar. Fill it with eucalytus oil and drill a 1mm hole in the lid and sit it in your grow room. They wont come anywhere near it cause the can smell the fumes. So far so good but dont know if its just luck or actually working. Cheap enough option that i am willing to keep it going. Personally i cant even smell it over my plants but they jar has evaporated maybe 50% over 3 months. Just thought id share.