Great question! The reason your windows may still be wet is because we utilize a ladder-less window cleaning method using water fed poles and pure water. This approach ensures that when the water dries, there are no streaks left behind, resulting in cleaner windows that stay that way for longer. While this method is highly effective, there may be some occasional “spotting” during the first-time clean. If you’re not entirely satisfied with the results, no worries! We’ll be more than happy to come back free of charge until you’re completely happy with the outcome. Your satisfaction is our priority