The answer to 'steam cleaner stained' is that steam cleaners can sometimes leave stains or discoloration on carpets, upholstery, or other surfaces. This is often caused by the heat and moisture from the steam, which can interact with certain materials or dyes and cause them to bleed or discolor.
Common causes of steam cleaner stains include using too much cleaning solution, not allowing the surface to dry completely before walking on it, or using the steam cleaner on delicate fabrics that can't withstand the heat and moisture. Symptoms may include visible stains, fading, or a sticky or tacky texture on the cleaned surface.