The answer to 'sanitizing discolored' is to first determine the cause of the discoloration. Common causes include mold, mildew, hard water stains, or general dirt and grime buildup. Symptoms may include visible staining, odors, or a dingy appearance.
For mild discoloration, DIY solutions like baking soda, vinegar, or hydrogen peroxide can often remove the stains. However, for more severe or persistent discoloration, it's best to call in a professional cleaning service. They have the right equipment, cleaners, and expertise to safely and effectively sanitize and restore the affected surfaces.