Windows in both homes and buildings need to be cleaned often to keep their luster. In most cleaning guides or housekeeping magazines you often come across various tips that advise people not to clean their windows in the sun. It can be difficult to clean the windows properly because the cleaning solution may dry easily, preventing you from doing a decent job. While it may be a good tip for householders, it's something which must be braved by professional window cleaners who may need to…