I'm having a hard time maintaining temps in my MES 30. I use an Ivation remote digital thermometer to monitor the temps and I'm getting wild swings from 200 to 270 degrees with no, or only minor changes from the control panel. It will be reading 225, then spike to 250, so I cut 10 degrees of the temp from the control panel, and it will drop to 200. Add 10 degrees, back up to 260. Has anyone else had this problem? Is it an issue a good cleaning will solve (it's only a year old, with maybe a dozen smokes on it) or is the element going bad?