MSDS for heet 99% methanol and 1% proprietary additive.
Do this in your garage (my neighbors think I'm crazy), burn cap-full of heet and you will be left with an oily residue. That oily residue is what's going to get deposited in your nozzles. If you want to risk having a clogged nozzle at full boost it's up to you but don't recommend it to others without letting them know(or knowing for yourself) the risks involved.
MSDS for yellow bottle of heet