BG excellent post; lots of "food for thought". I'm going to copy the text and save for the future.
I use a concoction of: Habanero Peppers, Tobacco, Garlic and a bit of dish soap. There are several formulas within the posts that talk about these, so I won't go into the actual amounts in the formula unless someone needs them. I spray initially day 1 and day 3, then 1X week thereafter. I agree that the act of physically wiping them down works but again, there really isn't a way to rid them unless you tear the room down, sterilize it (even re-paint it) and start all over. That means the growing media too! What a bitch! Once you got them, you've got them. The best one can hope for, is to keep them at bay...