I just bought a used earth stove and want to install it this weekend. I will clean the liner before installing the pellet stove, but I have no idea how to clean the liner after it is installed. It looks like the creosote will fall into the back of the stove and I won't be able to vacuum it out. I have never owned a pellet stove. I have a wood stove and clean it yearly. Just don't know when and how to clean the pellet stove.