So just cleaned my triple wall chimney, and lo-n-behold less than one gallon of fly ash. No creosote, no ooze, no buildup. Gotta love gassers. BTW went to a chimney fire yesterday morning and the double wall insulated pipe was stuffed full of creosote. Homeowner... I cleaned it a couple of weeks ago! Yeah sure ya did. Creosote is pretty cool looking as it falls out and is still glowing orange/white. Especially when its not yours.