The answer to 'steam cleaner odor' is that a lingering odor in your steam cleaner can be caused by a few common issues. This could be due to leftover dirty water, mold or mildew buildup, or a clogged filter or hose. The odor may also be from cleaning solutions or chemicals that haven't been properly rinsed out.
To address the odor, start by thoroughly cleaning and drying all removable parts of the steam cleaner, including the water tank, hoses, and attachments. You can also try running a cleaning solution or vinegar solution through the machine to help remove any buildup. If the odor persists, it may be time to replace the filter or have a professional service the machine.