As others have stated, plugging up the catalytic converter is caused by not following the owner's manual instructions. DON'T use the stove as a burn barrel for your garbage, and get the stove hot before you flip the flow through the catalyst.
I used my Blaze King with catalytic converter for 24 years before firewood became impossible to find around here at a decent price with no problems with the catalyst. It is still sitting out in the barn and if the mindset of the bureaucrats ever changes and we are allowed to harvest those trees burned in forest fires, I'll reinstall the Blaze King and go back to firewood. Much prefer burning firewood to pellet stoves with their noisy fans.