system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does moisture sometimes generate more friction (aiding better grips then dry hands for example) but other times generate less friction (slippery floor for example)?
gpt
Water sticks to surface.

Water glides over water.

When there is a lot of water, water acts as a gliding film between two surfaces.

When there is little water, water sticks to a surface on one side, sticks to another on the other side, but there's not enough water to form the gliding film, thus 'increasing friction' not unlike a double sided tape.