Cleaning your windows may seem like a daunting task, but it doesn’t have to be. There are just a couple of things you need: a simple cleaning solution, the right tools, and a foolproof method.

Cleaning experts say you should clean your windows at least twice a year, but more frequently if you live in an area with high levels of pollen or pollution. To lend you a helping hand, we asked two experts to share their best tips and tricks of the trade for cleaning windows on the inside and outside and achieving a clear, streak-free finish. Read on to learn how to clean your windows the easiest way like a pro cleaner.

How Often Should You Clean Windows?

Marla Mock, president of Molly Maid, recommends aiming to clean your windows at least twice a year—once in the spring and again in the fall

Sticking to this regular schedule will keep your windows looking clear and bright, and it will help prevent dirt and grime from building up and making it harder to remove. If you live in an area with more dust, pollen, or pollution, or you are near the coast, Alicia Sokolowski, president and co-CEO of AspenClean, says you should clean your windows more frequently, ideally every few months.

How to Prep Windows for Cleaning

1. Remove screens. Start by removing windows screens, inspecting them for damage, and cleaning them.
2. Clean the frame. Next, clean the window frame to prevent dirt from dripping on the freshly cleaned glass.
3. Remove solid dirt. Remove cobwebs and any other solid pieces of dirt.
4. Lay out all your tools and supplies. You have to work fast when cleaning windows, so lay out all your tools and supplies to ensure everything is within reach and streaks don’t form while you’re looking for something.

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How to Clean Inside the Windows

Clean the insides of your windows like a pro using Mock’s step-by-step method.

1. Make a cleaning solution. Fill a bucket with warm water and add a couple of drops of dish soap, making sure you don’t add too much soap as it will result in streaks.
2. Apply the cleaning solution. Take a sponge and dip it in the soapy water, then wring it out lightly. Use a circular motion to apply the cleaning solution to the whole window.
3. Clean from left to right. Grab a squeegee and starting in the top left corner, run it from left to right, wiping the squeegee blade with a clean rag after each stroke.
4. Work from top to bottom. Continue to run the squeegee from left to right, working your way down the window from top to bottom.
5. Dry the window. Take a crumpled newspaper or a clean, dry microfiber cloth to dry any areas that you may have missed.

How to Wash Outside Windows

1. Make a cleaning solution. Fill a bucket with warm water and add a couple of drops of dish soap.
2. Gather your tools and supplies. Make sure you have all the essentials on hand and grab a ladder if needed to reach tall windows. Alternately, use a squeegee with an extendable handle for hard-to-reach windows.
3. Apply the cleaning solution. Dip a sponge in the soapy water, wring it out lightly, and use a circular motion to apply the cleaning solution to the outside window.
4. Use a squeegee from top to bottom. Grab a squeegee but instead of working from left to right, run it from top to bottom.
5. Dry the window. Dry any missed spots with a crumpled newspaper or a microfiber cloth.

How to Clean Window Screens

1. Remove and inspect screen. Start by removing the window screens and inspecting them for holes and other damage. Make any necessary repairs.
2. Clean the screen. For a good clean, Mock recommends scrubbing the screens with a mixture of equal parts vinegar and water.
3. Rinse and dry. Rinse the screens with water to remove any vinegar residue and let them air dry completely before putting them back in place.

How to Ensure Windows Are Streak-Free

• To minimize streaks, Mock recommends cleaning windows using vertical strokes on one side and horizontal strokes on the other. That way, if you see streaks, you can immediately identify which side they’re on.
• Sokolowski says you should avoid cleaning windows in direct sunlight because it can cause the cleaner to dry too quickly and leave marks.
• Avoid using paper towels to clean windows. Instead, cleaning experts recommend alternatives such as crumpled newspaper and lint-free microfiber cloths which don’t leave behind streaks or residue.
• Clean one window at a time. Mock says if you try to clean multiple windows simultaneously, the solution may dry before you use a squeegee, which will result in hard-to-remove streaks.
• Avoid using too much cleaner—while it may seem counterintuitive, Mock says it can lead to streaks.

Additional Tips for Cleaning Windows Like a Pro

• To prevent fog and steam buildup on windows in high-moisture areas such as bathrooms, Mock recommends adding a few drops of glycerin to your cleaning solution. Spray the mixture on the glass, then wipe it dry with a microfiber cloth.
• When tackling tough spots like bird droppings or sticky residue, Sokolowski says you should let the window cleaning solution sit for a few minutes before wiping.
• A squeegee provides the best overall clean according to Mock, as it removes excess liquid efficiently and leaves windows crystal clear.
• If you notice stubborn streaks, take Mock’s advice and spot-clean them with undiluted vinegar.
• For a polished finish and professional-looking clean, Sokolowski suggests buffing the glass with a dry microfiber cloth.
• Don’t forget to clean window screens and sills—they often get overlooked but Mock says they collect dust and pollen which can make your freshly cleaned windows look dirty faster.