Hi, We use fume boards exclusively in our operation (Calif). We use Bee-Go (Butyric anhydride I think). Just sprinkle it onto (an ounce maybe) the absorbing surface of your board being sure to spread it well over the entire surface. Give a light puff of smoke across the top bars of the super you want in order that the bees will begin to go down into the box (not too much that they get confused), as they leave set the board on top. The fumes will continue to chase them out and if they are started out with the smoke they tend to keep going without stopping and it will be quicker. It really only takes a few seconds for mediums (10 -30). If you're worried about the exposure of the chemical to your honey use it judiciously and quickly. If you have a few (10-20) to do don't use the boards just pull frames like Richard suggested. One big drawback to repellants is that the chemical (Bee-Go) smells like vomit and will stay on your clothes and skin for at least 3 days. Honey Robber is a brand that has the scent of cherries added to it but just smells like vomit with a weak cherry scent after a while. Only really cold weather affects its use (55 and below F) it should be fine during the summer season. I hope you have a good relationship with your spouse or friends, this scent will make you a little less desirable for a short time. Also avoid the fumes if you can it will irritate the eyes. Hope this helps! Brian Tassey [log in to unmask]