I'll add my agreement to Don's comments.
SLX is my first choice followed by Heet (yellow bottle). Third choice is 190 proof Everclear (available in Oregon) that is also multi-use … but expensive.
In my stoves Everclear and KleenStrip Green do not burn as clean as SLX or Heet–they leave a slight residue of soot on the bottom of the kettle (or sides of Backcountry Boiler.
Side note: I gave up on Esbit a number of years ago (nasty smell/chemical deposits–particularly if you ever use it inside a tarp shelter in bad weather).
PS For anyone that uses HEET I'd suggest you get a dispensing cap from Zelph.

