Windex contains Ammonia-D and Alcohol, which do kill some bacteria, but not to the degree that Windex can claim to be a disenfectant cleaner. Windex does specifically make a disinfecting version of their product. Also, windex is only meant to clean surfaces that people don't have direct/constant contact with, because the chemicals can transfer to your hands, which can then transfer to your eyes, food, drinks, etc, and are unsafe for human consumption.