What's On My Windows?

White or chalky spotting from sprinkler overspray, irrigation, or runoff off the roof and siding. These are dissolved minerals left behind as the water dries, and once they bond to the surface a standard cleaning stops being able to shift them.

The specialty treatment uses a compound made for bonded mineral deposits. It improves the appearance, sometimes dramatically. Be aware of the limit: where the minerals have actually etched into the glass, that part does not fully resolve, and any honest answer has to include that.

Prevention beats treatment here every time. Redirect the sprinkler head that is causing it, then keep the glass on a regular schedule so deposits never get the months of undisturbed sitting they need to bond.

Screens hold an enormous dust load, and in shade the mesh goes green with algae. It reads as a dark or dingy screen from outside and cuts the light coming in.

Every window cleaning package includes the screens, but that is a dust-off and wipedown. Mesh that is genuinely loaded, or that has gone green, needs the screens taken out, washed with detergent, rinsed, and the frames cleaned before they go back in.

Grit, dead insects, and compacted grime in the bottom track, sometimes to the point where the window is hard to slide.

How much track work is in your visit depends on the package. Tracks that are genuinely packed need specialty tooling and enough labor that they do not fit inside a standard visit.

Holes, tears, bent frames, and popped corners. Cleaning a screen does not repair it, and damage usually turns up mid-visit when the screens come out.

We rebuild and re-mesh screens as a separate service, quoted per screen after we measure. For a single common-size screen a hardware store is often the faster answer, and we will say so.

A double-pane window that looks foggy no matter the weather, or shows a rainbow, iridescent cast inside the glass, has a failed seal. Moisture has gotten into the sealed space between the panes and it is not coming back out.

The fix is replacing the glass unit, which is glazier work. We can clean both faces of it and the fog stays exactly where it is, because it is on neither surface we can reach.

Cloudiness or a dull patch that does not change no matter how clean the glass gets, and shows most at a low angle or in direct sun.

Etching is a texture change in the surface of the glass itself. It comes from long acid contact, chemical overspray from concrete or fertilizer work, and most commonly from mineral deposits that sat long enough to eat in. That is the end of the road for hard water: caught early it comes off, left for years it stops being a deposit and becomes damage.

Cleaning makes an etched window as clean as it can be. The etching is permanent, and no restoration process rebuilds the original surface.

Glass that has been dirty for a long time hides a lot. Scratches, chips, and etching that were already there sit under the residue, and the day the residue comes off they are suddenly visible.

To someone who has never seen that glass clean, this looks exactly like damage the cleaner caused. That is why we look at the glass with you first and flag what we can already see.

A crack running out from an edge, or a small chip knocked out of the surface by a stone from a mower or a trimmer.

Neither is a cleaning problem, and both matter more than they look. A chip is a stress point that a crack can grow from, and a crack in a sealed unit means the seal is compromised whether it has fogged yet or not.

We photograph what we find and point it out before we work near it, because glass that is already cracked can carry on cracking when it is washed, and neither of us wants that conversation afterward.

Tempered glass can leave the factory with microscopic particles fused into its surface, left behind in the tempering oven. When a blade passes over glass like that, the particles drag and score fine scratches.

The defect is in the glass, not in the technique. The same blade on sound glass leaves nothing behind. There is no reliable way to detect it before scraping, which is the whole reason construction glass work carries a signed waiver.

What we do about it: we test scrape a small, low-visibility area on each type of glass first. If that test area drags or scores, we stop, document it, and talk to you before another tool comes out.

Low-E stands for low emissivity. It is a metallic coating thinner than a human hair that lets light through and reflects heat back, which is why a modern window holds heat far better than an old one. Nearly every window sold in the last twenty years has it.

Most of that coating is sealed between the panes, out of reach. Modern windows usually carry another layer on the interior pane, facing into the room. That one is exposed, and it is the surface you touch every time the inside of the glass gets cleaned.

It marks in one pass. An abrasive pad, steel wool, a scraper, or the wrong chemical is enough. The damage shows as fine scratching that catches the light at an angle, a haze that will not clean off, or the swirl pattern in the second photo, left by a scrubbing pad. It often reads faintly purple.

Coated glass takes microfiber and alcohol and very little else. Plenty of installers, construction cleaners, and window cleaners have never been told that, and most homes we walk into already carry some damage, usually done at installation before the owner saw the windows. None of it comes back out. We check before anything touches the glass, and we point out what was already there.

Applied film that is bubbling, clouding, peeling, or creasing away from the glass, as in the photo above.

This is a film stuck onto the glass rather than part of it, so the failure is in the film. Replacing it is window film work, not cleaning. Until then we clean around it carefully: a blade or an abrasive pad on tint destroys it in one pass, so tinted units get identified before any tool comes near them.

Run a finger down the frame. If it comes back white or gray with chalk, as in the photo, the frame is oxidizing.

UV breaks down the surface of the paint or vinyl and it sheds as powder. That makes it a sun problem. It shows on the south-facing side first, and on any elevation that takes heavy sun, while the shaded side of the same house stays clean.

Wet, the chalk turns milky and runs down the glass, as in the second photo. Dried on the pane it leaves a white film that looks like hard water, so people treat it as a glass problem when the source is the frame above it.

A standard cleaning takes off what has run onto the glass. It does not restore the frame, and the film comes back while the frame keeps shedding. Tell us if you want the frame itself looked at.

Rotted wood, corroded aluminum, failed paint on the sill, and soft or crumbling trim.

Cleaning does not repair any of it, and on wood that has gone soft, cleaning around it needs a light touch so it does not get worse. We flag what we find so you can get ahead of it.