I just fired up my Ashford today following instructions to get the temp into the "Active" state to close the bypass and engage the catalytic converter. Great. Now, I'm done and want the fire to go out. IF it goes below the "Active" state do I open the bypass OR leave the bypass closed. There are no shutdown instructions and my understanding is that running in the "inactive state" with the cat engaged is bad but also using the stove with the bypass open for long periods is bad.