Hazy windows are a recurring issues in Florida homes. What this means is that the gas that is inside the window has been allowed to escape and moisture mixed with air is allowed to affect the clarity of the window. It also lowers the windows efficiency. Some of these windows are under warranty so check when buying a home with this issue. Also you can check the rating of the window to determine if the window is within company standards. In other words did it fail within the normal time frame or is the window possibly defective from the manufacturer. These are all issues that you should pursue in the event you have this issue with the windows in your home.