Hi everyone. This will be the begining og my second season with my Jotul C 450 insert. I'm getting conflicting information on how often to get the liner swept. I have a Pro-Flex W605KA Wood Insert Stainless Liner 6 inch. One company said to do it every 2 years and "don't let anyone tell you it has to be done more often". Can someone help me out? I live in Suffolk county LI if anyone knows a reputable sweep. Thanks.