Solar panels,cleaned the right way.

Panels live in the weather and collect what it carries: dust, pollen, ash in fire season, and the chalky film hard water leaves when sprinklers overspray. All of it sits between the sun and the cell. Rain rinses off the loose dust and leaves the film — which is why panels that “get rained on all winter” still look hazy in June.

Glass, coatings, and live electrical equipment — a solar array is the one surface where gentle isn’t optional.

What safe actually means up there

Purified water, not chemistry. Panels get deionized water and soft brushes — no detergents, no minerals left behind to bake into new spots. The strong chemistry stays on the roof around them, never on the glass.

No pressure. High pressure can crack cells, force water past seals, and put the manufacturer’s coverage at risk. Nothing stronger than a gentle rinse ever touches the array.

Timing matters. Hot glass and cold water don’t mix — panels get cleaned when the array is cool, early or late in the day, so the temperature swing never becomes your problem.

Because panels usually share a roof with the growth we’re already treating, most people bundle the two: the roof gets its soft wash, the array gets its purified-water rinse, one visit, one written report covering both.