Haven't posted for a while but I recently added "Mite Away" formic acid quick strips to my 3 hives, and was rewarded with enormous numbers of dead mites on the pull-out below the SBB. Photo attached. Zoom in for a treat! I had worried for a few weeks about the high mite load, then got spurred into action by the appearance of deformed wing virus, and a lot of dead bees on the landing board. Hopefully the formic will take some of the pressure off the hives.