Has anyone had problems with the Lignetics pellets not burning all the way up and plugging up the burn pot. I thought this was a one time thing but it has happened with the last 4 bags we have burned. Checked out the stove and it was fine so I went and bought 2 bags of Big Heat pellets that our local feed store is selling and they burn fine but make alot of ash. This really surprised me, all the reviews I have read say Lignetics are good pellets. We are burning them in a King 5510.