The answer to 'steam cleaner grimy' is that a grimy steam cleaner is often caused by a buildup of dirt, soap residue, and mineral deposits from hard water. Symptoms include poor cleaning performance, water leaks, and visible grime on the machine and cleaning pads.
To address a grimy steam cleaner, you can try cleaning the machine by running a vinegar-water solution through it or using a steam cleaner cleaning solution. If the grime persists, you may need to disassemble and thoroughly clean the internal components. If the steam cleaner is still not performing well after cleaning, it's best to call a professional cleaning service to inspect and repair the unit.