Putting Out a Flare-up
Now, if you try to put this out with water, it will just sizzle off, mix with the fat and create more smoke, making the whole affair even messier.
If you try to spray water on it, the grease might start spreading out, getting thinner-layered. This will go out two ways; it will stop the fire at the moment, but you will get another flare-up eventually, or it will only make the fire much bigger with all that hot grease spreading around. You will, therefore, restrict yourself from using a spray bottle on a gas grill!