I get drawn back to checking out Explore Scientific's eyepiece wares from time to time.
Today I observe that they are bundling the 9mm, 14mm and 20mm together for USD1,150 - until end of year, I think. (Compare Ethos 14/13/21 from a US supplier - USD1,928.)
I read this in the eyepiece cleaning section of the site:-
Nitrogen-purged and waterproof, the 100˚ Series eyepieces are very easy to maintain and clean: Start by placing them under running tap water, then spraying them down with pure distilled water before drying them with compressed air. If there is stubborn debris (e.g. grease, makeup, pollens, dust, food, etc.) then wash them in a bath of water and liquid dishwashing detergent. Use wet tissues or cotton balls to remove very stubborn materials, then rinse well before spraying with distilled water and drying with compressed air."
Just hose them down, it seems!
