My 5er is quite tall and has a front window (Montana High Country 375FL). Bugs are always splattered on the window. I found an easy way to reach them.
Drop the tail gate of your truck and back the truck under the 5er like you are going to hitch up, but don't pull all the way under. Leave the tailgate end just at the edge of the camper.
Now, get a 6 foot step ladder and you can actually get the feet under the nose of the camper which moves the top of the ladder much, much closer to the front of the camper without even touching it. Do the area you can reach and then move the ladder some in the back of the truck for new areas you could not reach. If necessary, you can reposition the truck.
I do this all the time, after first landing on our next campsite, usually right after getting everything set up. A bottle of Windex and some paper shop towels and bugs gone! It's really pretty easy. On the fiberglass front cap that is not window, I'll use a soft RV brush on a short painters wand. The important thing is, I can reach (actually touch) every inch of the front cap if needed standing on the ladder in the bed of the truck.
And yes ... I'm 64 years old with an artificial knee, no problem climbing the ladder and being a bit of a dare devil. After the first time I tried this, the unknown fear went away. Now, I don't even think about how scary this may look ... old man on the top of a step ladder in the bed of a pick-up truck, hanging from one arm!
Truly "Red-neck engineering" at it's finest, wouldn't you say?
