If ash is building up daily? Then I sense an air leak. Either the bottom trap door is not sealing right, the ash pan gasket isn't sealing, or the door gasket isn't sealing properly. Check all gaskets using the dollar bill test and remove the little plate below the ash lip and look into that area, to see if the bottom trap door is eating correctly when closed? This door has been known to leave a little gap when shut.
I also sealed the area where the thermocouple wire comes in behind the pot. That is a burn pot bypass. Air comes through that hole, instead of through the pot. Every little bit helps. With good pellets, I can go upwards of 2 weeks without touching the clean out rod. Might have a little spec here or there, but the next shutdown and start up sequence takes care of it