One of the more enjoyable duties that has to be done is to remove all the bugs from the front of your rig when you return from a trip. OK, we all know that really isn't enjoyable but it is something that has to be done or soon that nice white front cap would soon be black with bug juice. I've tried many different methods and finally hit on something that works for me.
The first thing you should do is to put a good coat of wax on the front cap. The wax helps to keep the bugs from sticking to the surface. It can never hurt to put on a couple of coats as this is one area that will get scrubbed often. A safe bet is a good quality auto wax.
Now as soon as possible you should get to removing those bugs. Out of all the methods I've tried, I've found that using Bounce Dryer Sheets is the easiest thing to use. Just wet down the surface and wipe with the dryer sheets. Not sure what is in the sheets but you'll get a lotion type liquid out of them when they get wet and you start wiping. The textured surface of the sheets makes for a nice soft scrubbing cloth and with just a little bit of elbow grease the bugs will be gone. Once done, just rinse off with fresh water.
In the year or so I have used this method I haven't seen any damage to the decals. Depending on the amount that needs to be removed, I've used anywhere from 2 to 4 dryer sheets. Give it a try the next time it's time to get rid of the bugs on the front of your rig.