Hello, I am having difficulties with a Lee 309-170gr mould of mine. It is not aligning properly. Initially I thought it was as a result of one of the pins backing off (and that definitely was a part of the problem) however the problem persisted. I gave the mould a good clean (to be honest, it was pretty filthy). This also helped, however again, not all better. I am now thinking that it may be a bit of carbon clogging in the vent lines, however I am not sure how to get this out. I've tried using a piece of wood but it seems to be too encrusted. Same goes for dish-scrubbers and tooth brushes. Any advice would be appreciated.