The exoskeletons of kinorhynchs and other hard-bodied meiofauna are hydrophobic—they repel water—causing them to stick on the bubbles in the surface film.

Finally, spray with a protector to repel water and help to guard against future stains.

Apply after giving the shower a deep clean; it includes a protector that chemically bonds to the glass to repel water.

There are many products - some impregnate, while others seal and repel water.

With multiple coats the film will build an even protective film and gloss that may repel water, oil, grease and efflorescence.