I've tried just about everything for cleaning leading edges, including Wash
Wax All and Lemon Pledge in the squeeze spray bottle, and Jay's right, they
all work well. One good one for baked-on bugs was Adolph's Meat Tenderizer
dissolved in water and applied with a spray bottle. The enzymes, I was told,
soften the bug guts. However, it was recommended that one avoid
garlic-flavored tenderizer or one's plane could be renamed The Stinking
Rose.