Why do beads of water often form on slippery surface such as a freshly waxed car

Water is a polar molecule, composed of two hydrogen atoms and one oxygen molecule. As oxygen is more electronegative than hydrogen, electrons of the hydrogen atoms that are partially positive in molecules of water have a partial positive charge they are strongly attracted to the oxygen atom that has a partial negative charge, resulting in hydrogen bonding between the water molecules. However this is a small range force. On a slippery surface such as that of a freshly waxed car frictional forces can be ignored, also the forces of adhesion can be ignored as wax is a non-polar substance and does not attract water molecules. Hence the only significant forces acting on water are gravitational, the normal surface reaction force and the small range cohesion force between water molecules as a result of hydrogen bonding, that causes that water molecules to come together forming beads of water.