I buddy of mine had some Brillianize that he carries in a little spray bottle. I tried it and was very impressed with how it cleaned the bugs off the windshield and is anti static, no dust. It's never looked better. I picked up a gallon ($18) and an 8 oz spray bottle ($5.50) that I can use for refills. Here's what they say about it. It worked great on my zumo 665 and intrument panel too.
"Plastic manufacturers and fabricators have known for years that Brillianize gives plastic that 'million-dollar-look.' As a final top dressing nothing beats the look of a surface treated with Brillianize! Rated the #1 Anti-Static Cleaner and Polish by independent testing, trust Brillianize when you want to look your very best."
•Trade show
•Exhibitions
•Mould release
•Final top dressing
•Photographic studios
•Anti-static
•Fingerprint resistant
•Glass
•Plastic
•Painted surfaces
•Instrument gauges
•GPS screen
•Headlight lenses
•Taillight lenses
•Chrome
•Bright metal
•All hard shiny surfaces