yea my parents have plenty of um... sneeze shrapnel on their gauges, its quite nasty. id like to clean it up for them, but not scratch the holy hell out of the glass as well
If you have any Einszettt (1z) Cockpit Premium, it is a great QD for cleaning all plastic lenses and screens, including Nav screens easily without hurting them. If you use a nice soft microfiber, you will probably not scratch it anymore either. I use this all the time on Client vehicles and they always love the look. Dan F