Well that's it, Raedwulf. If you have lots of nasty creosote, then you discover the existence of Stovax, you get lots of loose deposits that can fall down your chimbley and cause problems. I think the aim is to start with a clean flue and keep it creosote-free with Stovax. Do you need it at all? Well I haven't bothered with it for about fifteen years now and the sweep's happy!   A good tip with a stove is to get the flue really hot just after you've lit the fire. Leave the vents open until you've got a helluva fierce blaze, and only then shut down. The flue will get hot all the way up and will draw up the air from your room in a really good draught. Sticky creosote deposits only happen if your flue is cold because you've shut down too early and/or you're burning wet wood. Can be a problem with big, unlined chimneys that are hard to get hot, but not really an issue with lined flues about seven or eight inches wide. Mind you, I've heard horror stories about people who've either been badly advised as to the type of steel flue they've been persuaded to fit or who have cut corners. The best flue liner you can afford is cheap when you consider the problems that cheap liners cause. False economy.

Yours sincerely, old fogey, using stoves for 31 years...😂