OKIE - Did you try the bomb during the day or at NIGHT? Wasps do NOT fly after dark. If I have a serious problem them I spray after dark. Wasps return to the nest at dark and are quite docile. If you are bombing them during the day then they are going to fly away from the threat and return later. The other option is to pop the top off the feeder and leave for awhile until the wasps settle down then return and throw soapy water on them. You could suit up with some insulated coveralls and wear a headnet along with work gloves and the wasps can't stink thru that.