I'm about to move my weak hive into a OB hive in the garage (enclosed). Do you generally see a reduction in SHB because of the length of the entrance (tube) that goes to the outside? Mine is about 1.5 feet thru the wall. I am going to try to remove all the SHB I can find on the frames before I put them in the OB. My probelm will be when I see a SHB through the glass and will not be able to SMASH IT! Because the hive is at the house, I may cork and uncork the tube each night and morning until it gets cold enough that SHB are gone.
No change...the SHB scoot through the tube like anything else!
My observations: SHB like the warmer area, they will stay there all day long, corking would be ineffective. Make sure that there are no areas where the bees can't get to.
If you can go with Plexi instead of glass then you will have the opportunity to drill holes and remove/kill the little beasts. (it is more $$$). I have two small areas that the bees can't get to: one along the side between the glass and the wood, and that was nice because they'd squeeze in there, then I'd just push the glass in and smash the beetles. The other are was next to a frame and I drilled some small holes and vacuumed them out
The key is to keep them well fed and not stressed, that will get the SHB going more than anything will.