Everyone's chimney accumulates creosote at different rates because there are so many variables: Moisture Content of Wood - needs to be 20% or less Burning Habits of the User  - if you "damper down" too early or for long periods you are going to create more creosote because the flue gases will be moving slowly. Efficiency of the Wood Stove  - some appliances have secondary burns and some have air leaks. Drafting of the Chimney - sometimes chimneys do not pull air out well. This is either because the flue is too large, the chimney is too short or there is an exterior impediment to a good draft. As a note, State Fire Marshalls recommend cleaning every two weeks.