The average cost for window cleaning a residence with 15 windows or more in Florida can vary depending on a number of factors, such as the size of the windows, the accessibility of the windows, and the condition of the windows. However, according to some industry sources, the average cost for residential window cleaning in Florida ranges from $5 to $15 per window, with an additional charge for screens, tracks, and sills. Therefore, for a residence with 15 windows or more, the cost for window cleaning could range from approximately $75 to $225 or more. It's important to note that this is just an estimated cost range and that actual prices may vary depending on the specific circumstances of each job. To get an accurate quote for your particular window cleaning needs, it's best to contact a professional window cleaning service in your area for a consultation.