Meguiar's Scratch-X removes them. I love that stuff! It even took off some silver overspray, oops.

 

If you are too lazy to clay bar then you can try using a Dryer sheet.

Yes, I said a dryer sheet, the stuff you put in the dryer to make your clothes smell good....lol.

All you do is dunk it in a bucket of water then gently go over the bugs and stuff with it. It works like a charm. Just be sure to wash off the car with regular car wash soap afterwards because it will leave streaks.

 

glad i found this thread.
just came back from a trip on the great old florida turnpike
after thanksigiving, and it looks like the bugs commited mass suicide on the front of my tc...