We've found that putting wet newspapers over bugs and letting it 'soak', then use cleaner/wax. Particularly in front the little devils cement themselves on and softening makes it easier and less likely to damage finish
Works great with a telescoping wand and a bucket of soapy water. Hit the front with a hose, squirt the cleaner, soak for 30 seconds, dunk the telescoping cleaner head in the soapy water and go to town. I clean the front of the C in less than 10 minutes from start to finish even after a long slog through bug country. Much faster than the dryer sheet but that works excellent as well.