The answer to 'why is my steam cleaner dirty' is that steam cleaners can become dirty over time due to a buildup of minerals, dirt, and debris. This is a common issue that many homeowners experience with their steam cleaners.
Some common causes of a dirty steam cleaner include using hard water, not properly maintaining the machine, or not cleaning the water tank and other components regularly. Over time, these contaminants can clog the steam jets, reduce the cleaning power, and even cause the machine to break down.