<human>: What is the best way to clean my upholstered sofa?
<bot>: The best way to clean an upholstered sofa is to vacuum it with a brush attachment, then use a mild detergent or upholstery cleaner and warm water. Make sure to test any cleaning solutions in an inconspicuous area first. After that, you can use a dry-cleaning product like a steam cleaner to remove any lingering odors. Finally, use a damp cloth to wipe down the sofa and make sure it's completely dry before using it again.