Now I used to use Windex, window cleaner, AmorAll, etc to clean my instrument panel.
However, a few years ago I broke a window in a patio door, and when I went to get it replaced, I was told I couldn't get glass...it had to be Plexiglass (Another example of the state saving us from ourselves, I guess...)
Anyway, the girl said DON'T use Windex, window cleaner, ArmorAll, etc.
Get some Pledge.
So, I did. The 'glass' stays cleaner a lot longer than with glass cleaner!
I spent most of the summer driving the Supra with the top off, and parking it in the parking lot at work (nobody would mess with it there.)
Aside from generating his own BioElectricity, the owner also 'paves' the parking lot with white crushed stone and limestone or something. The stuff is like sandpaper and blows around when there's any breeze at all. I took the Supra out of the garage yesterday, and sprayed the dash with Pledge. I never saw such a clean instrument panel in my life! Beautiful.
Now, according to the girl at the glass place, this should also keep the plastic from scratching and becoming cloudy. I have to admit, on an 18 year old car, the IP looks like it's brand new!