The effectiveness of hot water depends on the type of glass you’re cleaning. If you need to remove dirt and grime from windows, hot water is a great option. However, if you’re working with painted surfaces that could be damaged by heat (including car paint), it’s best to use cold water instead.

Cold water also works better for glass and windows because it won’t leave streaks behind as much as hot water does.

There are many ways to clean windows, but one thing is for sure: the temperature of your water makes a difference. Cleaning in cold temperatures is not recommended because it’s hard to control the amount of force you apply to a squeegee or cloth and could damage your window.

However, cleaning in colder temperatures doesn’t mean you have to skip cleaning altogether! A few simple changes will ensure that you get the best results possible (and keep your windows safe). Here are my tips:

• Always use warm water when cleaning outside windows—not hot or boiling water! You don’t want to risk cracking or breaking a pane of glass by overheating it with too much heat. Warm water will make any dirt or grime come off easily without causing any kind of damage.
• Use a squeegee instead of paper towels or sponges unless specifically instructed otherwise by an expert on how-to clean exterior glass surfaces safely! This will ensure that there’s no pressure applied directly onto any part of the glass surface itself since its edges won’t be protected from accidental drops from pressure exerted during cleaning efforts…

The best way to clean exterior windows is to do it when the weather is cool and in the shade. This will give you more time and help prevent over-drying of your window cleaner.

When cleaning windows, use a squeegee, not a rag! Rags tend to leave streaks in their wake while squeegees deliver a smooth lint-free finish.

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Use lint free cloths for wiping down your windows as well; they have less friction on glass than rags, which means they will clean more efficiently with less water needed per wipe.

Finally, always start at the top of each pane of glass and end where you started! This will help you avoid getting streaks or spots where dirt was missed on lower parts of your window (because those areas were wet longer).

This may seem like a lot of information, but it really isn’t. Now that you know what the best temperature is for cleaning windows and why, you can start using these tips in your own home!

Remember: If an area is difficult to reach, try using a ladder or chair to get closer. Also remember not to use too much water; this will cause streaking on glass surfaces if not cleaned off quickly enough after application.