I have problems I can't get a decent flame when my stove Is on high. The flame is barely out of the fire pot at start up and when the stove is going it's about an inch out of the pot. I'm using the same pellets from last year and I have cleaned my stove through out. I've recently installed an OAK and I did disturb the fire pot gasket. Took off the exhaust and cleaned it and replaced it. Does anyone have any ideas because this has never happened before. It's always performed just as the manual states.