Almost hit 70 degrees so I shut down and cleaned today after three weeks plus of constant run with Lignetics. Half a ton through my Harman Accentra insert. Ash pan a bit over half full. Some build up in the firepot but not much and not hard to chisel out. Air ducts showed almost no ash. Glass had some smudges of ash but Windex an a couple of paper towels took care of that. Ash in the igniter compartment but since I pull my ash forward several times daily that's to be expected. All-in-all I'm a happy camper. Wonder if I can go a month next time?