It’s that time of the year when our thoughts turn to Spring cleaning! When washing windows it can be very frustrating to see streaks and not be sure which if they are on the inside or outside. A trick is to use vertical strokes when washing outside and horizontal strokes for the inside. This way you’ll always know where you have to rub a little harder. If you use straight white vinegar on outside windows you will get the best results. And if possible, don’t wash your windows on a sunny day. They will dry much too quickly and most likely streak.