A Beginner-Friendly Guide on How to Clean Glass Windows (2025)

Cleaning windows isn’t exactly anyone’s idea of a good time, especially when it involves crank-out casement windows or huge tall windows you can’t even reach without standing on a chair. The good news? With the right approach, you can get crystal-clear windows with little stress, no fancy tools, and definitely no streaks.

And who knows? Once they’re spotless, you might realise your windows aren’t in such bad shape after all or maybe you’ll notice just how outdated or worn they really are. If cleaning only highlights the cracks, drafts, or cloudiness between panes, you might start wondering what it costs to replace them.

In this article, we’ll look at some of the best ways to clean glass windows, including sliding and casement windows, provide top streak-free cleaning tips, and cover DIY solution recipes to try at home. You might be surprised how new they might look with just a little effort.

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Gather Your Toolkit for Easy Window Cleaning

Although you won’t need anything fancy (chances are, most of the tools are already lying around your home), you still need a bit more than a bucket and a mop to get the job done right. Here’s how to clean glass windows: 

• Microfiber cloths or lint-free rags — provide a streak-free and lint-free finish.
• Squeegee — a game-changer for streak-free cleaning.
• Spray bottle or bucket — depends on your cleaning style.
• Soft-bristled brush or vacuum — a must for dusty corners and debris.
• DIY or store-bought cleaner — we’ll get to the easy recipes in a minute.
• Extension pole — for out-of-reach spots.
• Rubber gloves — optional but necessary if you have sensitive skin.

That’s it! If you have most of these, let’s move to the cleaning part.

How to Clean Glass Windows Properly: A Step-by-Step Guide

If you’ve ever wondered how to clean window glass at home without making a streaky mess, this go-to method works like a charm.

Step 1: Dust First

Start dry. Wipe the glass and frame with a microfiber cloth or vacuum attachment to get rid of dust and cobwebs. If you’re dealing with outdoor windows, a quick hose rinse is a good place to start.

Step 2: Spray Your Cleaner

Whether you’re going DIY (vinegar + water or rubbing alcohol + water) or using store-bought stuff, it’s time to spray it directly on the glass or your cloth to avoid drips.

Step 3: Wipe & Scrub

Use gentle, circular motions with your cloth or sponge. Leave it for a few minutes if you’re dealing with tough or grease stains. Wipe.

Step 4: Use a Squeegee

When it comes to a flawless finish, the squeegee always delivers. Start at the top and pull downward, wiping the blade after each stroke. If you’re cleaning smaller windows, no need to buy a squeegee — a microfiber cloth will do the job just fine.

Step 5: Catch the Drips

Don’t forget the window edges and sill! Use a dry microfiber cloth to wipe away the remains and keep things tidy.

Done! That’s how to clean window glass well.

Cleaning Sliding Windows (Without Removing Them)

While sliding windows seem tricky to clean, the good news is that you don’t have to take them apart or risk climbing on furniture to clean them properly. Here’s how to get them crystal clear without the balancing act:

• Vacuum the tracks to remove dirt and dust.
• Slide one window open and clean the glass you can reach.
• Wrap a microfiber cloth around a ruler or use a thin sponge to reach tight corners.
• Use a long-handled cleaning tool or a squeegee for the outer glass.
• If your window lifts slightly, clean under the tracks.

Still wondering how to clean sliding window glass from outside without climbing on a shaky chair? A long pole with a cleaning pad works like a charm.

Cleaning Casement Windows from the Inside

Casement windows (the ones that crank open) can feel super challenging to clean, especially from the outside. Here’s how to clean glass windows properly:

• Crank them open as far as they go.
• Use a microfiber cloth or sponge on an extension pole to reach the outer glass.
• If the angle is too awkward to reach, try a magnetic window cleaner — it simultaneously cleans both sides of the glass.
• Finish by wiping down the frame, hinges, and crank mechanism with a damp cloth.

Casement triple-pane windows can be a bit tricky, but with the right tools and techniques, you’ll clean them in little to no time.

5 Tips for streak-free windows

These little techniques can make a big difference, especially if you want to know how to clean glass windows without streaks:

• Clean on a cloudy day — the cleaner won’t dry too fast and leave streaks.
• Use a rubber-blade squeegee for a smooth finish.
• Wipe in different directions (horizontal inside, vertical outside) so you can spot streaks more easily.
• Ditch paper towels — all they do is leave lint behind.
• Buff the glass with a dry microfiber cloth or a crumpled newspaper for a shiny finish.

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DIY Window Cleaners That Actually Work

If you’re wondering how to clean windows without glass cleaner, here are two quick and effective recipes.

1. Vinegar-Based Cleaner

It’s a classic that’s eco-friendly and streak-free. The downside? It can make your house smell like a salad, so consider adding between 5 and 10 drops of essential oil (lemon, lavender, or peppermint). If the smell isn’t a bother, you’ll need:

• 1 cup white vinegar;
• 1 cup distilled water;
• 1 teaspoon dish soap (optional for greasy windows).

How to clean large glass windows: Mix in a spray bottle, shake well, and apply as needed. Wipe with a microfiber cloth or crumpled newspaper.

2. Alcohol-Based Cleaner

A go-to choice for a quick-dry solution that prevents streaks and water spots. You’ll need:

• 1 cup rubbing alcohol;
• 1 cup distilled water;
• 1 tablespoon white vinegar.

How to clean glass windows at home: Mix and spray on windows for a fast-drying, streak-free shine.

How often should you clean home windows?

Let’s be honest — we all put it off. But here’s a general guide:

• Indoor windows: Every 2-3 months;
• Outdoor windows: Every 4-6 months;
• Kitchen and bathroom: Monthly. 

If you notice ice buildup on windows in winter, that’s a sign that you need to pay extra attention, especially around the frame.

When to call the pros

There are a few scenarios when it’s better to call the professionals.

• High or hard-to-reach windows;
• Hard water stains that DIY methods can’t remove;
• Big houses or commercial buildings that need full treatment.

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