One other thing I've used in the past for the grill and still do for the
woodstove is buy a wax log and cut it into 1" chunks with a serrated
knife. Good 8 minute burn. Next to no residue.
Forgot all about that until I started back to splitting wood for this winter.
Funny how weird shit pops into your head while you're doing something mindless
like cutting the grass, etc.