The OP wasn't asking how to stop creosote, he was asking if burning aluminum cans will avoid the chore of climbing on the roof and cleaning the chimney after creosote has formed. Besides, you can't "stop" the formation of creosote... you can only minimize it. Newt eyes and bat wings won't help, salt is better reserved for helping put out a chimney fire... but it requires more than a sprig.
Actually there is a benefit to burning aluminum cans in a hot fire... manganese is released, which, through chemical reaction, causes creosote to (for lack of better terminology this morning) "dry out", flake, release from the chimney walls, and fall to the bottom. Gauging the effectiveness in your chimney is easy... just open the bottom clean-out and see how much loose stuff is there over time, verses how much was there without burning cans. Beverage cans contain something 'round 1% (or a bit more) manganese... not all aluminum alloys do. Burning them won't eliminate the need for brushing, but it will (or may) reduce build-up, extend the time between brushing, and make the job easier. Burning them has another benefit (or advantage)... it reduces the odds of creosote ignition (I ain't gonna' get into why that is), although the hot fire required also increases the odds during application.
And for a large portion of the country, aluminum cans are cheaper than store bought (so called) "creosote destroyers"... they're basically free.
Beware, burning aluminum may possibly pose some risk (depending), some of the by-products of heating and/or combustion are classified as a neurotoxin...
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