Anyone really think that there's a problem getting too much oxygen to the ember?? It's almost always the opposite, resulting in too fast a burn. Now, if your tobacco is wet and you tamp on it, it will inhibit oxygen flow. But that's a whole other thang.
Dumping ash is fine, you can make it a ritual, but please don't add it to a "must do" list that some feel they must adhere to.
Dumping ash is fine, you can make it a ritual, but please don't add it to a "must do" list that some feel they must adhere to.