Hi! Newbie here. We have a comfort bilt stove, love it so far! My question is, does the cleanout t cap leak? Not from the seam (where we were expecting) from from space at the top between the inner and outer layers? We took it off to clean it for the first time, put it back and it leaked while the stove was lighting. Took it off again to inspect it and rethread it back on and it still leaked a little. Is there supposed to be a tiny bit of space between inner and outer where the cap meet threads into the rest of the pipe? Thanks for your help!