i know this is a dumb question, but what do u guys use to clean your dark smoke windscreens. I have a puig db dark smoke. Will certain cleaners damage it, such as regular windex will normally turn tinted windows in cars purple bc of the ammonia. I normally use the plexus plastic polish/cleaner (i think that's what it's called) to clean mine, but as much as i clean my bike that stuff gets expensive