I once used alcohol gel in my Trangia, which looks a lot like the Tatonka. It clogged everything, there was hardly any jet flame possible, so efficiency of the burner was ruined.
Thanks to the closed construction of the burner, cleaning it properly wasn't possible so ended up buying a new one...
The old one is still usable, but I'm not taking it out on trekkings anymore, wouldn't mind using it when there's loads of ethanol available though.