Quoted from harbngr:
Ok, so in regards to cleaning the translate if it is needed. How/what would you recommend?
I don't need to, but for reference in the future. Want to make sure it is noted on the machine for a just in case.
I would be soooo saddened if years down the road I mess up and ruin it.
Also with the ink, how is the longevity of it, rough guess? Is there something we should do now in order to preserve it for the next 20 years?
If you ever need to clean it I'd just use a damp cloth and then dry it off. If you had a really stubborn issue I've tested isopropyl alcohol. It works, but it will take a little color with it if you rub hard, and might dull the area, so I'd use that in an emergency only and sparingly.
There are no inks used in these, it's a photographic process. So as long as it's behind glass and not directly exposed to sunlight all day (something we already do with our games) I can't imagine it won't look fine in 20 years. I obviously haven't had a chance to test that yet though.