How Often Should You Clean Your Windshield?
Reviewed by the Skyview Auto Glass technical team — NWRD-, ASE- and DINITROL-trained technicians · Updated November 2026
Quick answer
Clean the outside as needed — every fuel stop in bug or salt season, and whenever grime or water spots appear. Wipe the inside every few weeks, since plastic off-gassing builds a haze that scatters headlights at night. Clean the wiper blades whenever you clean the glass, and replace the blades every six to twelve months.
A simple schedule for inside and out
The outside of the windshield collects road film, bug residue, and hard-water spots, so it gets cleaned whenever the grime is visible — and more often in bug season and on salted winter roads, where a quick squeegee at the fuel stop keeps the film from baking on. The inside is different: it hazes from plastic off-gassing off the dash, not from the road, so it needs a wipe every few weeks whether it looks dirty or not.
That interior haze is the one drivers miss. It builds slowly, and by the time it is obvious, oncoming headlights already scatter across it at night. A quick wipe with an ammonia-free glass cleaner and a microfiber cloth every few weeks keeps it clear. The wiper blades get a wipe at the same time, since a dirty blade redeposits grime on the next pass.
How often to clean each part
| Surface | How often | Why |
|---|---|---|
| Outside of the windshield | As needed, and at every fuel stop in bug or salt season | Road film, bugs, and water spots bake on if left |
| Inside of the windshield | Every few weeks | Plastic off-gassing builds a haze that scatters light |
| Wiper blades | Whenever you clean the glass | A dirty blade smears grime back across the glass |
| Side and back glass | Every few weeks with the interior | Same interior haze settles on all the glass |
Signs the glass is overdue
- Oncoming headlights scatter and glare at night
- A haze of interior film has built up and needs a wipe.
- The wipers smear instead of clearing
- The blades are dirty or worn, and the glass needs a clean.
- Water spots are visible in sunlight
- Hard-water deposits have dried on the outside and should come off.
Clean the blades when you clean the glass
A wipe of the wiper blades with a damp cloth at every glass cleaning stops them from redepositing grime. Replace the blades every six to twelve months, or sooner if they streak or chatter.
More questions about cleaning frequency
How often should I clean the inside of my windshield?
Every few weeks, whether it looks dirty or not. The haze comes from plastic off-gassing off the dash, not the road, and it scatters headlights at night before it is obvious. See our interior glass guide.
How often should I clean the outside of the windshield?
As needed, and more often in bug or salt season — a quick squeegee at the fuel stop keeps road film from baking on. Clean it whenever grime or water spots are visible.
Do I need to clean the wiper blades too?
Yes, whenever you clean the glass. A dirty blade smears grime back across the clean surface on the next pass.
Related guides
More in Cleaning and care
Need auto glass service?
Skyview Auto Glass has 191 shops across Michigan, Indiana and Illinois, each offering in-shop and mobile service. Call us or book a visit — same-day service is often available.