What to Use When Cleaning Windows: A Complete Guide

Most household windows come clean with plain water and a mild, non-abrasive cleaner applied with a soft cloth and lifted off with a squeegee. Skip paper towels and vinegar-and-bleach cocktails. The right method: water, a gentle solution, a soft applicator, and a rubber squeegee that removes liquid before it dries. Get that sequence right and streaks disappear; get it wrong and you grind grit into glass or strip a coating. What changes everything is what’s on the glass: clear panes tolerate more than tinted, reflective, or filmed ones, and manufacturer instructions always win.

What Solution Should You Put On The Glass?

• Vinegar and water. One part clear vinegar to 1–10 parts clean water works, but vinegar is acidic — never combine with bleach, and skip it if the coating maker objects.
• Ammonia. About ½ cup per gallon of water is effective, but irritates eyes, skin, nose, and throat. Ventilate, wear gloves, follow the label.
• Commercial glass cleaner. The simplest route, especially for spot treatments.

Avoid acids outright — muriatic (hydrochloric) and hydrofluoric acid have no place near window glass. Abrasive pads and anything metal stay in the drawer.

The Order That Actually Prevents Streaks

Wet first, clean second, squeegee immediately — that order matters more than the brand, and working in shade keeps solution from drying before you remove it.

1. Identify the glass type — clear, tinted, reflective, filmed, or coated — and check manufacturer’s instructions.
2. Test-clean a small area and inspect for damage to glass or coating.
3. Work out of direct sunlight, especially on tinted or reflective glass.
4. Rinse or wet the surface with clean water to loosen grit and cut scratching risk.
5. Apply plenty of mild solution with a soft, non-abrasive applicator; agitate lightly.
6. Remove solution right away with a rubber squeegee, wiping the blade after each pass.
7. Rinse with clean water where needed, then dry with a clean, lint-free cloth or squeegee.
8. Clean exterior glazing top down so runoff doesn’t reach finished areas.

When it works, glass dries clear with no haze and the squeegee leaves a single clean edge. For stubborn spots, follow manufacturer instructions — keep razor blades out of routine cleaning.

Where The Usual Advice Falls Apart

The safest solution for ordinary glass isn’t automatically safe for low-emissivity coatings, tint, reflective layers, films, painted frames, seals, screens, mirrors, or electronic displays — each needs its own manufacturer’s spec first.

Window films usually handle mild detergent or standard household window cleaner, but the film maker’s instructions control. Spray cleaner onto your cloth rather than directly onto frames and sills. Never mix bleach with ammonia or other cleaners: those combinations can release dangerous gases.

If you’d rather not mix anything yourself, our roundup of the best cleaning solution for windows covers ready-made options tested on real glass.

High exterior windows don’t require a ladder. A telescoping pole with a brush, sponge, or squeegee reaches them from the ground — check for overhead electrical wiring, inspect panes and frames, and clear trip hazards first. Pressure washing works on hard-to-reach windows if you choose the lowest pressure, use a wide spray pattern, angle the spray instead of hitting glass head-on, and keep windows tightly closed against water intrusion.

Cloudy days beat sunny ones: direct sun dries solution before you can remove it, and that leftover film is the streaking everyone blames on the cleaner. For everything else — gloved hands, open ventilation, the label — the rules stay the same. The Glass Association of North America’s procedures for cleaning architectural glass products spell out the full test-clean-first method.