Hi New to the thread. I have a Harman P68. Lately, I have been having a auger squeal when feeding pellets. This starting happening on the past ton of Lignetic pellets (lots of ash and fine particles) so I believe they caused the problem along with carbon build up on auger I've search on the form and done the following: Cleaned fines box Mixed can of pellets with Graphite Scraped burnpot near bottom of pot All of this makes the squeal go away but eventually comes back. I just purchased some ACS Spray and misted onto pellets as now. This has helped greatly but still a little squeal What stove setting should I used for the ACS to work efficiently? Currently I have it in Room Temp Mode with Temp setting on 5 I'm never getting the Lignetics again (green bag) as I never had a problem until now. Thanks!