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Permalink Reply by Bob Pustell on September 2, 2010 at 9:19pm

Water, lots of it. Clean, drinkable water. Scrubbed with a clean wet human hand. Wet human skin will not damage plexiglass, even a fairly soft rag can scratch it. Slop on some water and then work the wetness around with your hand. Apply more water, repeat. Never work dirt around the surface, slosh it away with more water. If there are dried bugs, soak them for a while. End with a flush of water and let it sheet off. If you feel the need, wipe it dry with a very clean very soft cotton cloth, but just letting it air-dry will leave you with a water spot or two, but no real dirt.

For the inside, I use water on a wet, but not dripping soft clean cotton cloth. Usually, the inside is only slightly dirty and is easier to clean.

Caveat -- I have not done this to Zentith 701 windows or to bubble windows of any type, only standard aircraft windows.

By the way, if you have something that needs to be dissolved off (tree sap or paint residue or something) the only solvent that I am aware of (other than water) that does not attack plexiglass in some manner is Naptha. You can use that with a clean soft cotton cloth to get rid of sticky stuff and then use water and your hand to clean away any residue.

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