Skip to content
Locally owned in Montclair · Serving the Inland Empire
Knockout Cleaners logo KNOCKOUT CLEANERS

Window cleaning · Ontario, CA & the Inland Empire

Window Cleaning in Ontario, CA

Smudges, water spots and grime build up fast. Our professional window cleaning delivers a streak-free, crystal-clear finish every time, inside and out.

$9 per pane exterior · $17 inside & out (steam cleaning included)

Knockout Cleaners window cleaner washing a window in Ontario, CA

What's included

A streak-free clean, inside and out

Every window cleaning includes a thorough wash of interior and exterior glass. We clean tracks, wipe down sills, remove and reinstall screens, and leave you with a guaranteed streak-free finish.

  • Interior & exterior glass cleaning
  • Streak-free finish guaranteed
  • Screen removal, cleaning & reinstall
  • Window track & sill wipe-down
  • Hard water spot treatment
  • Residential & commercial properties
  • You never pay until you're 100% satisfied

Recent work

Window cleaning results

Drag the handle to see the transformation.

Same window after streak-free professional window cleaning by Knockout Cleaners
Dirty window with hard water spots and dust before professional window cleaning

Window cleaning

Same window track and frame spotless after window cleaning by Knockout Cleaners
Dirty window track and frame full of dust and debris before cleaning

Tracks & frames

Crystal-clear window glass and clean track after window cleaning by Knockout Cleaners
Spotted, dusty window glass and dirty track before window cleaning

Window cleaning

How it works

Three simple rounds

Round 1

Request your quote

Send us your property address. We'll call or text you back within a few hours to lock in your appointment.

Round 2

We clean every pane

Interior and exterior windows, tracks and sills scrubbed, screens reinstalled. Spotless.

Knockout

Enjoy the view

Crystal-clear windows that let the light in and make your home or business look its best.

Live from our Google Business Profile

What customers say

5.0

★★★★★
Google rating

Griselda Loera★★★★★

"The service I received was excellent. Moises was professional and on time! They cleaned my windows and they came out amazing! Will definitely use them again!"

Google review
Adam Franco★★★★★

"Moises did a wonderful job! Came to my house, came EARLY and got the job done EARLY! Cleaned my roof AND my windows. NO SPOTS and very charming young man."

Google review
barriotoboulevard★★★★★

"Moises did an EXCELLENT JOB! I'm honestly impressed. They worked efficiently, didn't leave a mess, and the price was fair. I'll definitely use them again."

Google review

Questions

Window cleaning FAQ

How often should I have my windows professionally cleaned?

We recommend professional window cleaning every 3 to 6 months for homes. Commercial properties with high foot traffic or street-facing windows benefit from monthly cleaning. Regular cleaning prevents the hard water stains and mineral buildup common in the Inland Empire.

Do you clean both the inside and outside of windows?

Yes. We offer interior and exterior window cleaning for homes and businesses throughout Ontario, CA and the greater Inland Empire, with a streak-free finish.

Can you remove hard water stains from windows?

Yes. Hard water stains are very common in the Ontario and Inland Empire area. We use specialized solutions to safely remove mineral deposits and restore your windows.

Is window cleaning safe for all types of windows?

Yes. We safely clean standard glass, dual-pane windows, tinted windows and skylights without scratches or damage.

How much does window cleaning cost?

$9 per pane for exterior only, or $17 per pane inside and out with steam cleaning included. Send your address and we will give you an exact price within a few hours.

Free estimate

Get your window cleaning quote

No obligation. We reply within a few hours. Prefer to talk? Call or text (909) 402-0314.

THANK YOU FOR SUBMITTING!

We will contact you within the next few hours.
Need us sooner? Call (909) 402-0314

By submitting this form, you agree to be contacted by Knockout Cleaners about your request by phone or email. We will only text you if you check a box above. Your information will not be shared with third parties.

No spam · Your info stays between us