For streak-free glass, remove loose dust first, use a small amount of compatible cleaner, wipe the entire pane before the liquid dries, and finish with a clean lint-free cloth or squeegee. Streaks usually come from leftover residue, a dirty cloth, too much product, or cleaner drying unevenly—not from a lack of scrubbing force.

Check what kind of surface you have

This method is for ordinary household window glass and uncoated glass surfaces. Before cleaning tinted windows, low-maintenance exterior coatings, decorative or antique glass, mirrors, shower-door treatments, or automotive glass, check the manufacturer’s instructions. Electronic screens are not part of this method; use the device maker’s directions.

Also inspect whether the cloudy area is on the reachable surface. Haze or moisture trapped between panes in an insulated window cannot be wiped away from the room side and may indicate a failed seal.

Gather simple, clean tools

You need a soft brush or dry microfiber cloth for loose dust, a glass-compatible cleaner or mild soapy water, and clean lint-free cloths. A well-maintained squeegee is useful for larger panes. Protect the sill or floor from drips.

Do not use a cloth that has recently held furniture polish, cooking grease, or fabric softener residue. Those materials can transfer a film to the glass. Avoid abrasive pads, powders, and metal blades unless the glass manufacturer specifically approves them; coated glass can be damaged by techniques that appear safe on plain glass.

Clean the frame and remove loose dirt first

Dust the top of the frame, tracks, and sill before wetting the pane. Brush or vacuum grit away rather than dragging it across the glass. If the frame is dirty, clean it with a material-compatible method and change cloths before working on the pane.

This dry pass keeps dust from mixing with cleaner and becoming muddy residue. It also prevents a clean pane from being marked by dirty water running down from the frame.

Apply less cleaner than you think

Lightly apply enough product to wet the working area without flooding the edges. On small panes and mirrors, applying cleaner to the cloth can control overspray. Avoid letting liquid collect around mirror backing, window seals, painted frames, wood, or nearby electronics.

Work in manageable sections if the pane is large. Andersen advises cleaning its compatible window glass on a cloudy day because direct sun can dry the solution quickly and contribute to streaking. Manufacturer instructions take priority for a specific window coating or product line.

Wipe, remove, and buff

With a cloth, wipe in overlapping passes and turn to a clean section as residue transfers. With a squeegee, start at the top, overlap each stroke slightly, and wipe the blade edge between passes. Catch drips at the bottom before they dry.

Inspect the glass from more than one angle. If a faint streak remains, buff only that area with a fresh dry lint-free cloth. Reapplying a large amount of cleaner can simply spread the residue again.

Diagnose streaks that keep returning

If the whole pane looks smeared, replace or wash the cloth and try less product. If marks follow every squeegee stroke, clean the blade and check it for damage. If pale spots remain in the same locations, mineral deposits may be present; use only a deposit-removal method approved for that glass and its coating.

Greasy interior film may need a first pass with mild detergent and water followed by complete removal of that solution. Do not mix cleaners or combine a commercial glass product with bleach, ammonia, acids, or another formula.

If the mark cannot be felt, does not change after a compatible cleaning pass, and appears inside the glazing unit, stop adding products. Cleaning harder will not repair etching, scratches, coating damage, or a failed insulated-glass seal.

Sources

A visual summary for this cleaning guide