I have exactly the same eyepiece, and had exactly the same problem with regards to having plenty of moisture inside it.
We took a break at Ron's place one night and went inside for a cuppa, while we were inside sipping and chatting there was a sudden and unexpected shower of rain. My 30mm ep was sitting face upwards in the dob's ep rack, by the time we went outside again it's "face" was a tiny lake of water.
I found the same problem trying to clear it - I couldn't seem to get it warm enough in the sun to force the moisture out, I also tried warming the oven a bit (fan forced glass bowl type) and putting the ep in while the oven cooled again. It needed 3-4 treatments but finally it seems I've manged to get it dried out.
While I'm sure a Nagler would be somewhat more resistant to moisture ingress than these wide view "cheapies" (no criticism intended, I'm a big fan of mine) as far as I know the only ep range that are definitely sealed (and nitrogen purged!) are the Pentax XW's.
Which just makes that $420 price tag sound better and better all the time ....
