Ideally, you would clean your high rise windows with an extendable water-fed pole. But if that is not available you could use a telescopic cleaning pole, glass cleaner and a drop of dish soap.
Using an Extension Pole and Squeegee
When cleaning exterior windows up high, you can make quick work of most windows with an extension pole and a squeegee. These traditional window cleaning tools for hard-to-reach windows include a pole-mounted scrub brush that holds a large volume of window cleaning solution.
Cleaning Windows from the Outside
Using a soft microfiber cloth, go over the surface of the window. For higher windows, use a sponge mop (or a soft cotton or microfiber mop) on a pole. Rinse thoroughly with the hose. Spray or mop with the vinegar and water solution or with a commercial cleanser.
Some windows may be so dangerous to reach for external cleaning from a ladder that window cleaners and customers will have to accept that cleaning must be done from inside, or at greater expense, for example using other means of access. If these options are not possible, the windows should be left uncleaned.
Place some warm water into a bucket and add a few drops of good-quality dish soap. Then use a non-abrasive scouring sponge to soap up the glass before rinsing it clean with the vinegar-water solution. A crucial part of how to clean the outside windows of a condo is not compromising your safety.
Window cleaning professionals suggest avoiding window washing on very sunny days or at a time when a window is in direct sunlight, as the heat may cause the glass to dry too quickly and cause smears.
Not all double hung windows tilt in for cleaning, but most of them have this feature. Tilting windows usually have tilt latches or buttons near their sides, so you can see whether your windows can tilt easily.
The short answer to the question - "can you put a ladder against a window" is no. You should never attempt to lean a ladder against a window even if you think it's secure. The force of the ladder against the glass plus the additional weight of you, your equipment, etc. can cause the glass to crack or shatter.
Mix up your window-cleaning solution: In a plastic spray bottle, mix together 2 cups of warm water with 1/4 cup white vinegar and 1/2 teaspoon of Dawn. Sweep away dirt: Using a broom, sweep away the cobwebs and debris from the windows and sills.
And I actually found it to be rather useful. Before getting into it, it's worth pointing out, that window vacuums aren't just for clearing condensation on windows, they also good for sucking up spills on glass and streak-free window cleaning as they have a squeegee head and onboard tank.
Glass scraper: The glass scraper is useful for removing caked-on dirt and grime from the windows. Sponge or T-bar wand: Window cleaners use these tools for wetting the window with soapy water. Squeegee: Window cleaners use squeegees to wipe the dirty water away and leave behind a clean, streak-free window.
The simplest answer is you should have your windows cleaned once or twice a year in spring and fall. Most professional window washing companies will tell you the same.
Clean Outside Windows
You'll remove the first layer of dirt and make the detail work that much easier. Plus, on a summer day, you can use window washing as an excuse to splash in the water a little bit.
Environmentally Friendly - Effective cleaning without chemicals or soap. Safer Work Environment - Less risk of property damage. Added Privacy - The customer need not worry about being visible through upstairs windows.
Try a Mop to Extend Your Reach
A mop can help you reach windows from the outside. To get streak-free windows, mix equal parts water and white vinegar in a bucket. Then, dip a standard mop or a microfiber cloth in the cleaning solution, and wipe down the window's surface.