Yeah, best way to go is prevention of the stickies. The longer they sit the more they stick. And the more you get the more you're gonna get. The smell of the smushed ones attracts more. Eventually they will break down the clear coat, too. Do the RainX. Make sure you have a good coat of wax. I never heard of the cooking spray but it makes sense. During lovebug season we wash frequently, a couple times per week. On long trips you gotta find a place to stop for gas and a wash. Just keep washin......
Did the Hess on-property have a carwash??? I'm trying to remember.....