The answer to 'why is my steam cleaner greasy' is that a greasy steam cleaner is usually caused by a buildup of dirt, soap residue, or mineral deposits in the machine. This can happen over time as you use the steam cleaner, especially if you don't properly clean and maintain it.
Some common symptoms of a greasy steam cleaner include a sticky or oily residue on surfaces after cleaning, reduced steam output, and difficulty getting the machine clean. To fix this, you'll need to thoroughly clean and descale the steam cleaner according to the manufacturer's instructions. This may involve running cleaning solutions or vinegar through the machine, removing any removable parts and washing them, and performing a deep clean of the interior.