Only used it once, when neighbor's very bad chimney caught fire; even
though that chimney sucked air, the fire went right out, I'd say within
2 minutes.
I keep the sticks, or used to and have just now bought new ones, now
that they've come available again, but seeing as how I'm pretty
compulsive about keeping stoves in good shape and pipes and chimney
clean, hope they'll still be here unused when I die...