its simple just make the whole screen termit then light the termit and wait.
I see what you did there... you made that sponge absorb water so when its burned water would come out and turn off the fire/lava/plsm whatver it made it burn -.- Well played
Caustic gas owns it. It's funny, I was just playing with gel on sponge to be an "insta-cooker" as it turned sponge the colour of steak, then I see this.