Ethanol Chaffing fuel and Sterno (same thing) are notoriously difficult and time consuming to get to water to a rolling boil and for cooking,

I'll bet if you use TWO cans of sterno the water would boil even quicker

but the fuel is relatively cheap to purchase and is reasonably safe to store and use for home use inside.
since you're using a "wood gas" stove , wood pellets are even cheaper (10 times) ... and the stoves are easy to improvise