The answer to 'steam cleaner filthy' is that a dirty steam cleaner can be caused by a variety of issues, including buildup of dirt, grime, and soap residue, as well as clogged filters or hoses. Symptoms may include poor suction, water leaks, or the steam cleaner not heating up properly.
To troubleshoot a dirty steam cleaner, start by checking the water tank, hoses, and filters for any blockages or buildup. You can try cleaning these components with a mild detergent and warm water. If the problem persists, you may need to descale the steam cleaner by running a cleaning solution through the machine. If the steam cleaner is still not functioning properly after these DIY steps, it's best to call a professional cleaning technician to inspect and repair the unit.