I got my SS today and am cleaning my patio doors. I tried cleaning them yesterday with a rag and that just left a streaked mess. Now the glass is starting to look like it's not even there, which is the way I like it. I don't even have the window attachment, BTW. Still, the difference is amazing. I used it to clean the gross door tracks too. And while releasing the pressure to prep for a refill, I aimed it at the stove control knobs which I had previously tried cleaning with chemicals to no effect, It was working! I can see why some people wish the tank were larger, but if it was, it might be too heavy to comfortably hold for long. PS: Don't take a chance with your tap water. Only use distilled water. At a dollar or less a gallon it is worth protecting your investment.