Cleaning a Fluorite Doublet

I have a couple of Celestron C102F's that am doing head-to-head A/B comparisons. One sample of is especially dirty and I woud like to clean the outer two surfaces of the doublet objective that are exposed to the air. I am not taking the lens apart, only unscrewing the entire lens cell assembly from the tube and then cleaning the the outer two surfaces. I use the Astro-Physics optical cleaning kit:

http://tinyurl.com/eo9vv

Am I o.k. with lightly cleaning the Fluorite element? It is uncoated. Surely this had to have been cleaned when the scope was initially assembled.

Thanks.

It's OK to clean it as long as you don't use canned air. It can be so cold after expansion that it could crack the fluorite.

Dmitri

I removed and cleaned the fluorite element uncoated of a doublet, and had no problems using the usual common sense, plus:

Resist the temptation to "huff" the lens with your breath, or water, which can attack fluorite. Use technical grade acetone or isopropyl alchool and kleenex. Use thin plastic gloves.