The easiest way to clean windows without streaks is to use less liquid than you think and dry the edges properly. Streaks often come from dirty frames, too much cleaner or water left at the glass edge.
Quick reference chart
| Question | Best answer | Why it matters |
|---|---|---|
| Best first step | Dust frames and sill | Dry dirt can smear across wet glass. |
| Cleaner amount | Use lightly | Too much product leaves residue. |
| Best tool | Squeegee or microfibre | Both help remove water rather than move it around. |
| Outside windows | Rinse loose grit first | Grit can scratch or smear. |
| Avoid | Hot direct sun | Cleaner dries too quickly and streaks. |
Step-by-step method
- Dust the frame, sill and corners before wetting the glass.
- Rinse outside glass first if it has grit or loose dirt.
- Apply a light window-cleaning solution or warm water with a small amount of washing-up liquid.
- Wipe the glass from top to bottom with a clean cloth or applicator.
- Use a squeegee in overlapping strokes, wiping the blade after each pass.
- Dry edges, corners and the sill with a clean microfibre cloth.
- Buff any remaining marks with a dry cloth once the glass is nearly dry.
How to clean inside windows
Inside windows usually need less water. Dust blinds, frames and sills first, then use a lightly damp cloth or squeegee so water does not run onto paintwork.
How to clean outside windows
Rinse loose dirt first, especially after wind or building work. Work top to bottom and avoid scrubbing gritty glass with a dry cloth.
Common mistakes
Avoid cleaning in hot direct sun, using too much product, wiping with a dirty cloth, or forgetting the wet edges where streaks often start.
What to read next
For more practical guides, see how to clean shower glass, how to clean blinds, how to clean a shower curtain, Home Cleaning Guides hub.
Frequently asked questions
What is the best way to clean windows without streaks?
Dust first, use a light amount of cleaner, squeegee or wipe top to bottom, then dry the edges with microfibre.
Why do my windows streak after cleaning?
Common causes are too much cleaner, dirty cloths, direct sun drying the glass too quickly, or water left around the edges.
Can washing-up liquid clean windows?
A small amount in warm water can work, but too much leaves residue and streaks.
Should you clean windows in direct sun?
It is better to avoid hot direct sun because cleaner can dry before you remove it.
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For the bathroom and glass-cleaning cluster, see the guides on cleaning a shower drain, cleaning shower glass, cleaning a sink drain and cleaning windows without streaks.
For the newer cleaning cluster, see how to clean carpet stains, how to clean a mattress, how to clean grout and how to clean an air fryer.