Just a suggestion I am no expert but couldn't you wet them down with a water bottle or is that a no no when in flower. I also read somewhere that a little dawn dishsoap in a little water would deter bugs from regular plants I do this with some of the flowers I grow outdoors but not sure if the same applies to weed. But it does work at keeping them away.

But those are just a couple of quick suggestions that came to mind but don't do anything until someone with more experience lets you know. Good luck and hope nothin happens to your crop.