The answer to 'tough stains on sanitizing' is that tough stains can be caused by a variety of factors, including food spills, grease, dirt, and even bacteria. Symptoms may include discoloration, odors, and difficulty removing the stain. To address tough stains, it's important to first identify the type of stain and then use the appropriate cleaning method.
For many tough stains, a DIY approach using household cleaners and scrubbing can be effective. However, for more stubborn stains or if the stain is on a delicate surface, it may be best to call in a professional cleaning service. They have access to specialized tools and cleaning solutions that can tackle even the toughest stains without damaging the surface.