Hi. So my heater wasn’t working for a bit. So a YouTube video showed me how to bypass the membrane. Sure enough a $30 part saved the day. Or so I thought. After firing up for a bit - I noticed the sound of slightly restricted airflow (just sounded off and some whistling). However, seemed to be just fine. After about 5 minutes - I noticed a horrific smell and smoke out of the exhaust. I immediately shut it down. Does anyone know if I can ‘burn off’ a few more times? Or do I need to get in and remove the dead mice? Appreciate it.