The answer to 'why is my steam cleaner filthy' is that your steam cleaner can become dirty over time due to a buildup of dirt, debris, and mineral deposits from the water used. This can lead to reduced cleaning performance, unpleasant odors, and even damage to the machine.
Some common causes of a dirty steam cleaner include using hard water, not regularly cleaning the machine, and not replacing worn-out parts like the water filter. Symptoms may include poor steam output, discolored water, or visible grime inside the machine. To fix a dirty steam cleaner, you can try descaling it, cleaning the water tank and other components, and replacing any worn parts. If the issue persists, it's best to consult a professional cleaning technician.