OK, So I was thinking a bit about it today - maybe the atty is clogged/flooded etc (due to the lack of vapor production) on my M402.
Took it off, blew threw the batterie end of it and noticed liquid coming out from around the bridge - maybe three drops total.
I let it dry a bit and screwed it back on and NOTHING - LED on batt works, the atty's little lite under the bridge came on but nothing for vapor.
Got home tonight and put on another atty and things are fine again. Still not a cloud like I would prefer, but at least something.
Did I kill it? should I clean it?