The answer to 'why is my kitchen stained' is that kitchen staining is usually caused by a combination of grease, food spills, and improper cleaning. Over time, these can build up on surfaces like countertops, backsplashes, and floors, creating unsightly stains and discoloration.
Some common causes of kitchen staining include cooking oil splatters, tomato sauce spills, wine or coffee drips, and even hard water mineral deposits. The stains may appear as dark, greasy spots or dull, discolored areas. Improper or infrequent cleaning can allow these stains to set in and become more difficult to remove.