The most reliable streak-free glass cleaner for most UK homes is a simple DIY mix of equal parts white vinegar and water, sprayed on sparingly, wiped with a microfiber cloth, and buffed dry with a second dry cloth straight away rather than left to air-dry. A shop-bought glass cleaner works just as well when used the same way. Streaks almost always come from using too much product, a dirty or linty cloth, or cleaning in direct sunlight, not from the cleaner itself.
Windows and mirrors are one of the few surfaces where more product usually makes things worse, not better. A light, even spray and a confident dry buff beat a heavy soak almost every time, and the method matters more than which bottle is doing the spraying.
What Actually Causes Streaks
Streaky glass is rarely about the cleaner itself. It's almost always one of these four habits.
Too Much Product
A heavy spray leaves more liquid than a cloth can lift in one pass, so the leftover film dries into visible streaks.
Hard Water Spots
Mineral deposits from hard UK tap water dry onto glass as a cloudy ring, especially around taps, shower screens and cold frames.
A Dirty or Linty Cloth
An old towel or kitchen roll sheds fibres and smears old grime back onto the glass instead of lifting it off cleanly.
Cleaning in Direct Sunlight
Warm glass dries the solution before it can be wiped away evenly, baking a streak pattern into the surface as it goes.
The Streak-Free Glass Kit
Nothing here is specialist. Most of it is already in a UK kitchen cupboard.
Core Kit: Every Clean
Extras: As Needed
Shop-Bought Glass Cleaner vs DIY Vinegar Solution
Both get glass streak-free when used the same way. The difference is cost, convenience and a couple of label checks.
DIY Vinegar Solution
Equal parts white vinegar and water in a spray bottle costs pennies per refill and cuts through grease, fingerprints and light mineral spots well. It has no added polish or fast-evaporating solvent, so it needs a confident, immediate buff with a dry cloth to avoid its own faint streaking.
Shop-Bought Glass Cleaner
Usually includes a fast-evaporating solvent and a mild surfactant that helps it dry streak-free with less effort on the buff. Convenient for quick top-ups, but costs more per use, and it's worth checking the label for ammonia before using it near tinted or coated glass.
A typical case: a ground-floor flat with large sash windows facing a busy road had picked up a visible haze within a few weeks, mostly traffic grime rather than fingerprints. A shop-bought spray had left faint streaks in the afternoon sun more than once. Switching to the vinegar-and-water mix, spraying lightly, wiping in one direction with a microfiber cloth, and buffing dry immediately rather than letting it air-dry cleared the haze across all six panes in a single pass, with no streaking even in direct light.
Two Things That Make Any Glass Cleaner Streak Worse
Check Before Using Ammonia, and Never Clean in Full Sun
Ammonia-based cleaners can damage tinted films and some coated or tempered glass, including certain oven doors and double-glazed units with a low-E coating, so check the manufacturer's guidance first if in doubt. Separately, avoid cleaning any glass in direct sunlight or on a warm pane, since the solution dries before it can be wiped away evenly, which is one of the most common causes of streaking even with a good cleaner. Skip paper towels for the final buff, too, since they shed lint that ends up back on the glass.
Three Picks for a Streak-Free Finish
None of these are glass cleaners in a bottle. They're what makes the vinegar-and-water method quick and repeatable.
Clear Glass Spray Bottle - 500ml
£5.00
Mix the vinegar-and-water solution in a bottle you can see through, so it's easy to tell when it needs topping up.
Buy Now
Silicone Dish Washing Scrubber
£7.09
Non-scratch enough for glass, useful for lifting dried bird mess or sticker residue before the vinegar pass goes on.
Buy Now
Compostable Cellulose Sponges
£3.58
A quick first wipe to lift dust and cobwebs from a sill or frame, so the glass itself only needs the streak-free pass.
Buy NowWhich Glass-Cleaning Method for Which Job?
A quick way to decide before you reach for any bottle.
Related Reading
What Cleaning Products Do Cleaners Use in the UK?
The categories, habits and kit bag of a professional cleaner
What Are the Best Cleaning Products in the UK?
What actually makes a cleaning product good, beyond the marketing
Eco-Friendly Cleaning Products UK
Genuine certifications, ingredients to avoid, and spotting greenwashing
How to Remove Limescale Naturally
Vinegar and citric acid methods for taps, kettles, toilets and glass
Best All-Purpose Cleaner UK
What "all-purpose" should mean, and what it still can't do
How to Clean an Oven Without Chemicals
The bicarbonate-and-vinegar method for baked-on grease and carbon
Disinfectant vs Antibacterial Cleaner
What each claim actually means, and when the difference matters
Shop Our Cleaning Products Range
Reusable bottles and non-scratch tools that make the streak-free method quick to repeat.
Shop Cleaning Products