believe it, window cleaner, you know windex type. I go to the dollar store and buy the cheapest. I have two spray bottles in the hangar. I have one, the wife uses the other. We go over the whole airplane, another way of checking out the airplane. You say the wife, yup, she finds things real good that are wrong or potentually so. On the bugs, we spray it on the whole airplane, then we go back to where we sprayed first, by then the bugs come right off. The rag we use are the white terry cloths, from Costco.