The answer to 'upholstery cleaning smells bad' is that there are several common causes, including mold, mildew, or bacteria growth, improper drying after cleaning, or the use of harsh cleaning chemicals. Symptoms may include a musty, sour, or unpleasant odor that lingers after cleaning.
To address this issue, start by thoroughly inspecting the upholstery for any signs of moisture or dampness. Ensure the area is completely dry before putting the furniture back in use. You can also try spot-cleaning the affected areas with a mild, natural cleaner and allow it to fully air dry. If the smell persists, it's best to call in a professional upholstery cleaning service, as they have the equipment and expertise to deep clean and deodorize the fabric properly.