It depends on the surface you’re trying to clean. For example, a mixture of vinegar and water is a good option for a deep cleaning, including removing hard water stains from glass or stainless steel. However, vinegar is too acidic for granite and other types of natural stone, so it’s better to use a combination of baking soda and water on those surfaces.

There are a few qualifying questions you can ask a professional window cleaner to help you decide if it’s the right company for you:

• Does your price include the inside and outside of the windows?

• Will you clean the tracks, rails, and other internal components?

• Are you fully insured?

• How many years of experience do you have?

• What kind of cleaning products do you use?

• Do you have any customer references?

• Do you provide any other services, like exterior power washing?

Yes, WD-40 can remove stickers from glass thanks to its chemical properties that can break down adhesives. Be sure to wear protective gloves when handling WD-40. Spray the window or glass item, and let it sit for 10 minutes before scraping it with a plastic scraper or credit card.

Long-handled telescopic brushes are the best way to clean the outside of a house without a pressure washer. There are even special attachments for cleaning the outside of windows. Use a gentle cleaning solution for both the roof and siding to avoid harming the finishes. Be sure to rinse the area thoroughly with a garden hose after scrubbing.