The answer to 'pressure washer smells bad' is that a bad smell from your pressure washer is usually caused by a buildup of mold, mildew, or other organic matter in the machine. This can happen if the washer is not properly cleaned and stored after use. Symptoms include a musty, unpleasant odor coming from the pressure washer.
To fix this issue, you'll need to thoroughly clean the pressure washer, including the hose, wand, and any other attachments. Start by disconnecting the hose and wand and scrubbing them with a mild detergent and warm water. Then, run the pressure washer with a cleaning solution designed for pressure washers to flush out the internal components. Make sure to dry the machine completely before storing it in a cool, dry place.