Sundew, or Glass That Cleans Itself

Field notes

The page separates the coating choice by rainfall, abrasion, substrate, and cleaning budget rather than presenting one universal solution. Its comparison table distinguishes rolling droplets from UV-driven film oxidation, while the applications section identifies different failure modes: texture loss under wiper abrasion, slow photocatalytic action in shade, and cemented dust after dew cycles. The site also frames optical transmission as a central design constraint and gives a target of under one percent loss for solar-module cover glass.