Dirty Solar Panels
Reduce Efficiency
Professional exterior and solar panel cleaning in Washington using purified de-ionized water for a spotless, streak-free clean — without harsh chemicals or damage.
Exterior cleaning, done the right way
Specialized equipment and pure water for results that last longer than traditional cleaning.
Solar Panel Cleaning
Restore lost efficiency with safe, pure-water cleaning.
Window Cleaning
Streak-free, spotless windows inside and out.
Gutter Cleaning
Clear gutters and downspouts before the rains hit.
Exterior Cleaning
Soft-wash siding, soffits, and roofs without damage.
Why clean solar panels — and why rain isn't enough
Western Washington's mix of pollen, evergreens, and damp climate creates the perfect storm for panel buildup. Rain alone can't break through the film of contaminants that quietly steals your output.
Recover lost output
Studies show 5–30% efficiency loss on neglected panels.
Protect your investment
Clean panels last longer and meet warranty conditions.
Rain doesn't clean
Evaporated rainwater leaves mineral spots and streaks.
Healthier home exterior
Stop moss, algae, and grime before they spread.
The hidden enemies of efficiency
Even on a rainy Pacific Northwest roof, panels collect contaminants every single day.
Tree sap
Sticky residue from cedars and firs binds dust to glass.
Pollen
Spring blooms coat panels in a yellow film that rain smears.
Bird droppings
Acidic and opaque — they create permanent hot spots.
Mineral spots
Evaporated rain leaves hard-water deposits behind.
Moss & algae
Damp PNW climate fuels growth on panel edges.
Atmospheric grime
Road dust, exhaust, and wildfire ash settle in.
Pure de-ionized water. Soft bristles. Zero damage.
Our water-fed pole system uses purified, mineral-free water that lifts contaminants and dries spotless — no soaps, no streaks, no risk to your panels or roof.
- 100% pure de-ionized water — dries streak-free with no residue
- Soft-bristle brushes safe for panel coatings and glass
- No pressure washing — ever — on solar or roof surfaces
- Ground-based water-fed poles, technicians stay off your roof
- Approved by major solar panel manufacturers
See the PeakFlow difference
Before and after on real Washington homes.
Solar panels — Bellevue
Heavy pollen + bird droppings cleared in under 90 minutes.
Windows — Issaquah
Pure-water rinse leaves zero streaks, even in direct sun.
Trusted by Washington homeowners
Real local service. Real care for your investment.
Questions, answered
Everything Washington homeowners ask before booking.
Proudly serving Western Washington
Fast response across the greater Seattle metro and Eastside.
Don't see your city? Ask us — we serve the surrounding areas too.
Ready for a spotless, more efficient home?
Book your free, no-obligation quote today. We'll respond within one business hour.