The answer to 'sanitizing smells bad' is that there are several common causes, including lingering odors from cleaning products, pet smells, mold or mildew, and trapped odors in carpets, fabrics, or crevices. Symptoms may include a persistent unpleasant smell that won't go away despite cleaning. Solutions can include using an ozone generator, baking soda, vinegar, or enzymatic cleaners, and may require professional deep cleaning in some cases.
If the smell persists after basic cleaning, it's best to call in a professional cleaning technician to identify and address the root cause. They have the specialized equipment and expertise to thoroughly sanitize and deodorize your home.