Hello All...my 5 year old P68 has slowly developed an issue with the hopper lid sticking when the stove is cold...it takes quite a bit of effort to open the lid and pour pellets into the hopper and closing the lid involves pressing down on the lid to get it to seal...however, this only happens when it is not running and the stove has been off..with the stove operational and hot, there is no problem opening the hopper lid or sealing it closed and latching it...should I be looking at a latch adjustment, or a latch replacement (or replacing the hopper lid gasket)? No pellets are on the lid that are interfering with it opening and closing, by the way. Thanks in advance!