most infestations come from people who go into your grow room...and they do not take the proper precautions...IE...not taking your shoes off. Going into a room with dirty clothes on. Not washing your hands or wearing gloves...etc.

And, in my case...becuase I had to use a wall mounted AC...instead of an indoor A/C. It blew the little fuckers into my room. Something for me to fix.

Know your variables.