It's important to ask what types of chemicals and tools are used during the cleaning process, especially if your windows are tinted.

Many companies will clean with eco-friendly materials upon request.

· What's the cost: Window cleaning prices vary and are often based on the number and size of windows, the time estimated to do the job and the complexity of the job.

Always ask for an in-home estimate.

MONEY SAVING TIP:

You could save a few bucks by cleaning the first floor windows yourself, and leaving the second floor, more difficult to reach windows, to a pro.

· Satisfaction guaranteed? Ask the company if they provide a money-back guarantee if you're not 100 percent happy.

Most companies will offer one and some even offer a rain guarantee. So if it rains within a certain amount of time of the cleaning and your windows are spotted, the company will come back out at no charge to you.