I missed the part you are from Alaska. I burn anthracite as I realized I am reasonably close to the worlds best fuel but I am a slow learner. TIp 1 is, only buy the 73 the OM22 is junk. Tip 2, only burn diesel/kero whatever you may call it. Tip 3, learn that not all keros are the same!!!!. I use a SG pyknometer and measure SG - I can't remember the numbers but look at the fuel - great kero is a delicate pink fuel. Never use heating oil #2 or #1, it HAS to be KI. You are in oil ville research this point carefully - in my part of the world heating fuel just get worse and worse. If you use the best fuel the 73 needs no maintenance period - 56s are good too. If it is sooting up you are using crappy fuel. Alsheating in Maine has for years been promising to develop a video on maintenance. Make sure that your mains power is clean. Always reset the clock after a power outage the 2:00AM cleaning is vital even in the summer. Remember all these fuels pick up water during summer humidity so make sure your stuff is fresh. Nothing screws up those little pumps like a little water. Good luck.