I have been reading about people who seal the door on their pellet smoker. I do see a good amount of smoke coming from the door. This has to be a heat loss too. Will adding a seal to have the door seal tighter be a good idea or not. Will it affect the smoker in any way, will it still get enough air or overheat. And why doesn't the companies put them on. They sell a door seal on Amazon for the smokers but does it work on a pellet smoker Any and all replies will be appreciated.