Been trying to learn as much as I can and fast as I can, and have been watching a lot of videos on you tube. One or two were guys making home made shb traps with corrugated yard signs. Fill one side of the cell with crisco, then boric acid, then seal the other side with crisco. I made some, but am reluctant to use them due to the boric acid. Has anybody used these, and what were the effects on the bees? Did the traps work? No ill effects for the girls? Any input is appreciated. Thanks in advance!