I have been using Biokleen products for some time now and they seem to work very well on the MH. The good part is that the bugs do not stick very well to the front end and for the most part can be hosed off with just water.
I use the Biokleen soap when washing the MH as it contains a little bit of the protectant and gives back the shine. You can see the products at
Biokleen - Bio-Kleen - Boat Cleaning Products | Biokleen.com.