i've been told about a manufactured "log" that you burn every once in a while that will remove or loosen creosote build ups .
it doesn't sound like you need them,but have you ever heard about them
your opinion?
Well, for decades I have tossed copper water tube / cable scraps into the firebox after one old timer told me that the copper puts off "something" that helps keep the chimney clean.
I remember checking on those logs and the powder you toss in the fire and it seems the active ingredient was copper sulfate or oxide so maybe the burning copper in the stove has a basis in science? Not sure if burning a fire with copper in there makes copper sulfate or oxide? Seems it would make copper oxide as it was heated?
Just something I have done for years. The copper seems to last a long time and I usually just resupply it and toss the "used" stuff on the scrap pile a couple times a season.
No guarantees and it may be an old husbands tale but what I do. Seems to work.
Google doesn't yield much easy info on what is in those logs.
The active ingredients are phosphorus pentoxide and
ammonium sulfate. The mechanism of action (according
to the patent) is unknown.
About all I could find.
For about $50 you can get a brush and fiberglass rods to fit your chimney.
Mechanical cleaning is a must regularly but you can cut back how often by burning hot fires with dry wood.
Tom