You can clean windows both big and small with the Bosch GlassVAC, since it includes both a large suction brush and a slightly smaller suction brush. With that, you can clean the little window in the attic or the one above the front door. The large suction brush is used for the rest of your windows, or you can clean the shower wall in the bathroom with it. Fill the spray bottle with cleaner and attach the microfiber cloth to lather the windows. Next, you dry it without any streaks using the suction brush. The vacuum system ensures that no water will drip onto the window frames. This is thanks to the special rubber edge that you can also find on the renowned Bosch windscreen wipers.