Clean the glass when it’s out of direct sun, wet the pane with water and a few drops of dish soap, pull a squeegee top-down in overlapping strokes, and dry the edges — only the edges — with clean, dry microfiber. Streaks are almost never dirt you missed: they’re cleaner that evaporated on the glass before you removed it.
A streak is an evaporation problem
Everything you put on glass — spray, soap, even tap water — is a liquid carrying something: surfactants, minerals, the dirt it just lifted. If that liquid dries on the pane instead of coming off the pane, its cargo stays behind, and that residue is the streak. It’s why the cloth-in-circles habit fails: it doesn’t remove the liquid, it relocates it. And it’s why sun is this job’s first enemy — a Miami window in afternoon sun is warm to the touch, and on warm glass the solution flash-dries in seconds, faster than any hand can chase it.
If this sounds familiar, it’s the same physics we walked through on steel: in how to clean stainless appliances without streaks, the problem was also residue drying in the wrong place. Glass just tattles harder, because light passes through it.
The method, step by step
- Mix a bucket, not a spray. Water plus a short squirt of dish soap. The soap loosens the greasy film no dry cloth can move; for household glass you don’t need more chemistry than that.
- Wet the whole pane with a sponge or the scrubber side of a window tool, generously into the corners — that’s where the film lives that the cloth gets blamed for later.
- Squeegee top-down, straight overlapping strokes, and wipe the rubber blade dry between passes — one swipe of the cloth along the blade, then keep going. The squeegee is the only tool in this list that removes liquid from the glass rather than spreading it, which is why it runs the job.
- Dry microfiber on the edges only. The frame leaves a thin line of water where the blade can’t reach; chase it with a clean, dry microfiber. Don’t re-buff the middle of the pane — it’s already clean, and rubbing it only redistributes whatever is on the cloth.
- One pane at a time. Wetting the whole window and squeegeeing “in a minute” hands half the job to the sun.
Two quick myths. Paper towels shed lint onto damp glass — you trade a streak for snow. And the newspaper trick belongs to an older era of inks; a clean microfiber does the same work without the gamble. If your tap water dries to a mineral haze, a final pass with distilled water — water alone — takes it out of the equation.
The Miami part: sun, salt, and the A/C
Here the “out of direct sun” rule isn’t a preference — it’s a schedule. Chase the shade around the house: east-facing glass gets done in the afternoon, west-facing in the morning, and an overcast rainy-season morning is honestly the best window-washing weather this city offers. Near the water there’s one extra step: salt air leaves its film on the seaward faces, and dragging a soapy sponge straight across it means scrubbing salt against the glass. Rinse with plain water first, then wash.
And don’t skip the interior face. Miami windows live shut — the A/C runs all twelve months — so the inside glass builds its own film from cooking aerosols and recirculated dust. It’s the half of the job nobody suspects, and in most homes here the single biggest “window” is the patio slider, which collects fingerprints from everyone who walks through it.
Questions about your place specifically? No need to finish the article — call, text, WhatsApp, or email us and we’ll take it from here.
When to hold the squeegee — and when to hand it off
Here’s where JAS honestly stands in this. A residential cleaning — the 2–3 hour visit with a 2-person team, from $189 — includes “Window sills + tracks” on its 28-item checklist, but not the glass. The glass is its own published row: “Interior windows & frames,” $12 per reachable interior pane in the booking flow — sliding tracks are separate — and from $10 per pane on the deep-clean and move-out cards of our services page. The full map of that boundary lives in does house cleaning include windows?, and every add-on’s numbers, side by side, in what cleaning add-ons cost.
The load-bearing word is reachable. Our one published exterior row is just as plain: exterior window cleaning, per accessible ground-floor pane, from $15, confirmation required. Everything above that line — the second-story picture window, tower glass — is another trade, with poles, pure-water rigs, and ladders rated for the height, and the right company for it is a window-cleaning company, not the one cleaning your house. Telling you that here costs less than disappointing you at your door.
FAQ
Why do the streaks only show up once the sun hits the glass?
They were there the whole time — a thin residue film is invisible in flat light and obvious in raking light. Check your work the way it will be judged: step to the side and look across the pane at a low angle before you put the bucket away.
Do I need a store-bought glass cleaner?
Not for this method — a few drops of dish soap in a bucket of water is what window cleaners run all day. Sprays are fine for touch-ups, but they flash-dry fast on warm glass, which is how streaks start. If your windows carry tint or film, the installers’ published care guides say to skip ammonia products; soap and water is the safe default.
There’s a haze that won’t wipe off from either side — what is it?
If it’s on the outside face, it’s usually mineral spotting from sprinkler overspray or salt film — that needs its own treatment, not more soap. If wiping either face changes nothing, the haze may be trapped between the two panes of an insulated unit: a failed seal. No cleaning reaches it; that’s a glazier’s conversation.