Fipronil is often used as the insecticide inside beetle barns. This is not legal for use inside a bee hive. Tanglefoot is a super sticky goo that is used as a pest barrier on trees etc. If you put your q-tip or cotton ball in the center and surround that with Tanglefoot, the beetles will become stuck in the Tanglefoot. Apple Cider vinegar or a wax moth lure will attract the beetles.