Just tried this for SHB control, only had one sheet so it got cut in half and tossed in two hives for a test last week. I placed the half sheet on top of the frames at the corners of the hives and left them alone. After about ten days I checked the 1/2 swiffer sheets in the hives and counted a good 30 dead SHBs on each sheet which is a higher kill rate than I get with Beetle Blaster oil traps. Looks like it is working great for SHB control in my two hives and will be part of my pest management from now on.
Sorry no pictures of the swiffers with the beetle kill, didn't have a camera when I hit the yard today.
Thanks for the tip sc-bee