The only way to truly prevent their infestation is by regular, thorough cleaning.These insects are hard to filter out due to how tiny they are. They love to graze chlorophyll off the top of leaves in herds and even lay eggs and colonize in the buds themselves. That’s one nest you don’t want to smoke.
Keeping a constant air flow or misting the plants should keep thrips from landing on the plants or taking flight. The best spay is pyrethrum and should be sprayed 2-4 times during a 10 day cycle. Hopefully this will help them flush them out.