Hopefully, that will work much better for you. I'd still try some Heet if it doesn't just to be sure.

I don't know how TD does its cone design - if they work solely on only fitting the diameter of the pot without regard for water volume or take volume into account also. It could be they made this stove TOO efficient (e.g., slow-burning). You can do that with even small amounts of water. The stove will burn a long time on little fuel, but never reach a boil because there's not enough heat for the amount of water. It could be you need a stove that burns a bit faster.