Well don't try Rain-X's new stuff. It streaks like a xxxxx no matter what you do. I've tried other cleaners but Stoner's has worked great for me. I saturate it more on bugs on the windshield and it takes them almost completely off; just a little elbow grease finishes them off.
I wonder, since Stoner's is good with the bugs on the windshield, if it would do any harm on painted surfaces on the grille? I'll have to try this as it is lovebug season here in Florida.