I would spray your current crop daily with potassium bicarb; spray them hard to knock the stuff physically down. This will wash your plants and possibly save your current grow. Obviously, run the room's RH a bit lower to help the buds dry, and increase the interval after the first few days, and try to discontinue altogether as the plants enter their final week before chop.
Between crops, spray your ROOM with
Eagle 20 SC, including floor, outside of buckets, corners, closets, everything. Spray the plants you plan to move into the room before the trip with your choice of foliar sprays, I would suggest Cap's foliar pak properly brewed up and sprayed on regularly. Now, you've killed it on your new plants and you've killed the room, and that will at least give you a leg up on it.