Why does getting your fingers wet help open plastic bags

Question

Why does getting your fingers wet help in opening the plastic fruit and vegetable bags from the roll at the grocery store. It seems like wetting them makes your fingers stick to the bag yet, water normally makes things more slippery.

In: 1

Answer 1

Water is very good at sticking to things, like a plastic bag or a finger. It also washes off the layer of grease on your fingers (generated by your body), decreasing their slipperiness.