When you are spraying those pesky wasp nests that are up under the eaves or on the ceilings of your porches, some of the spray invariably ends up running down the can and onto your hand. I use the disposable nitrile gloves doctors and dentists use, and I only need to use one on the hand that's spraying. When you're finished, just peel it off so that the poison is on the inside of the glove. Then simply throw the glove away.