Mix the milk, eggs, water, sugar, butter, vanilla, and salt in a blender. Add the flour and blend again.
Heat a frying pan over medium-high heat and spray it with oil, making a non-stick surface.
Pour just enough mixture in the pan to cover it, swirling the pan to ensure the mixture spreads evenly. You want it to be coated with a thin surface but not so paper-thin that it will tear when you flip.
Wait about 1 minute, 30 seconds to flip the crepe, making sure that the top is set. Then wait until the other side is done before taking it out of the pan. We suggest that you use both your spatula and quick fingers to make sure that you turn it all the way over!
Cool the crepes on wax paper.