I'm fairly certain that putting water on a venting lithium ion battery is about the worst thing you can do, fwiw.
My scariest moment was a few years ago. I had a dark horse clone with a spinning center post. To tighten down the 20ga kanthal builds I was using I needed to hold the center post with needle nose vice grips, which also happened to clamp down on the negative post at the same time, creating a dead short.
I had already metered the build and had put it atop my Sir Lancelot clone to pulse and squeeze and after a bit decided to tighten down the post screws. Forgot to lock the ring, inadvertently pressed the button, and the mod got extremely hot, extremely quickly.
I was building in my kitchen and managed to quickly remove the button with potholders and dropped the extremely hot HE2 into a plastic toolbox. In the end the battery cooled without venting or melting the wrap or anything else, but I immediately retired the cell.
Then there was the time I vented 2 VTC5's in a row with a smpl clone topped with an authentic Veritas. Pin extended plenty, seemed legit, worked fine for months... then one day the rubber oring that acts as an insulator on the bottom of the atty decided to squish when the mod button was tightened down. Press button, button gets scorching hot, VTC instantly starts pissing electrolytes. Didn't realize what caused the vent. Checked build on meter, all good. Cleaned up button and contacts, installed fresh VTC 5. Pressed the button and exact same result. Scorching button, pissing battery.
I went and bought an IPV5 Li shortly thereafter and never looked back. TC for life.