Pellets backing up fill burn pot and start going up shoot

My cheap Charlie runs good for awhile then Pellets backing up fill burn pot and start going up shoot

WHAT WAY TWO TURN THE BUTTON YWO SLOW DOWN THE FLOW OF PELLETS TWO THE LEFT OR RIGHT

Usually if the pellets are backing up into the hopper drop chute there is not enough air to burn the pellets completely. There needs to be 35 parts air to 1 part fuel for proper burning. Make sure the stove and venting is clean and the exhaust blower is not weak or the bearings are not wearing out. Replace exhaust blower if needed. check the instructions for the trim pot to increase or decrease the pellet flow on the low heat settings.