I'll toss into the mix, what I like.........
Simple Green "Extreme" --- Boeing spec.
This was available at Home Depot for awhile in 32 oz. spray bottles, but it seems that HD has discontinued the product. I got my last two gallons just yesterday from Aircraft Spruce.........which was delivered by "UPS" in perfect condition.

Note: there is a recent UPS thread lurking around here..
We spray this on, let it set a bit, and then wipe with a wet rag, followed by another dry rag. Takes the bugs easily off, and dry's to a polished look. We spray the plexiglass with a different cleaner.
L.Adamson --- RV6A