The answer to 'steam cleaner moldy' is that a moldy steam cleaner is often caused by improper cleaning and storage of the machine. Mold can grow in the water tank, hoses, and other damp areas if the steam cleaner is not thoroughly dried and cleaned after each use. Symptoms include a musty odor, visible mold growth, and poor cleaning performance.
To fix a moldy steam cleaner, first unplug the machine and disassemble it as much as possible. Soak all removable parts in a solution of warm water and white vinegar to kill the mold. Use a soft-bristle brush to scrub away any remaining mold. Thoroughly dry all components before reassembling the steam cleaner. To prevent future mold growth, be sure to empty the water tank, clean the machine, and allow it to fully air dry after each use.