Cleaning Spice & other old calculators

[Dieter]

(03-30-2015 05:02 AM)Katie Wasserman Wrote:  Also, if there are ink marks I take those off with isopropyl alcohol before I start polishing.

Is isopropyl alcohol safe for the painted labels below the keys? And what strength do you recommend? The usual 70% or something different?

BTW, I often use disposable wet cleaning wipes for glasses or lenses, for instance like these. I think they work quite well. Since they are designed for cleaning delicate (and coated) glass surfaces they can be expected to do no harm to calculator displays either.

Dieter