Water droplets attach to the web fibers at various locations, but the largest drops accumulate at the intersections of fibers that form acute angles. The best angle for a large droplet: 36 degrees.

Dew drop: dew forming on a grooved surface. (Courtesy: PB Bintein et al / Phys. Rev. Lett.) A grooved surface that collects water by encouraging large dew droplets to form rapidly and then trickle ...

When growing dew drops coalesce together, the merged drop jumps off water-repellant surfaces. The jumping motion is automatic, powered entirely by the surface energy initially stored in the dew drops.