The answer to 'why is my kitchen grimy' is that a grimy kitchen is often caused by a buildup of grease, food residue, and dirt over time. This can happen from regular cooking, spills, and not cleaning the kitchen thoroughly and frequently enough.
Some common symptoms of a grimy kitchen include sticky countertops, greasy cabinets and appliances, and a general dull, dingy appearance. The good news is that this is a very common problem that can usually be fixed with some thorough cleaning. However, if the grime is severe or you can't seem to get it fully cleaned, it may be time to call in a professional cleaning service.