I have been using a CL1250 Alterra for about 3 seasons now and I just tried to “open the air” back up to reload my stove and the arm that adjusts the air has been getting harder and harder to move, it feels as if it bent some because it has tucked in further to the left than it used to go. Is there an area on these that need regular maintenance to keep them moving smoothly? Lubricant? I am hesitant to use lubricant because of the obvious heat. Anyone else had this issue or similar problems with the air control on the regency stoves? Thanks.