The answer to 'why is my steam cleaner grimy' is that a grimy steam cleaner is often caused by a buildup of dirt, mineral deposits, or residue from cleaning solutions. This can happen over time as the steam cleaner is used, especially if it's not properly maintained and cleaned after each use.
Some common symptoms of a grimy steam cleaner include poor cleaning performance, water leaks, and visible grime or discoloration on the machine. To fix this, you'll need to thoroughly clean and descale the steam cleaner according to the manufacturer's instructions. This may involve using a cleaning solution, vinegar, or other descaling methods. If the issue persists or you're uncomfortable doing this yourself, it's best to have a professional cleaning technician service the steam cleaner.