One time I loaned one of my RMs out and when I got it back a week later, the guy said it "leaked" all over the place. When I opened it to re-wick it with my own wick, sure enough there was juice everywhere. As I was wiping everything off to re-wick it, there was a tiny sliver of wire (a clipped off leg, no doubt) that came out on my Kleenex with all the leaky juice. After I put it back together, it never leaked again. Moral of the story: check for a little sliver of wire in the threads. It would be hard to see, but it could be there and it could affect the seal and/or the seating.