The dishwasher, despite its purpose of cleaning dishes, is ironically the most unhygienic appliance in the home, harboring more bacteria than even the trash bin. Regular cleaning is essential to prevent the buildup of food residue, soap scum, and grease, all of which promote bacterial growth. Simple steps like removing leftover food debris after each cycle, cleaning the filter, using dishwasher salt to soften water, deep cleaning with white vinegar, and leaving the door open after each cycle can help keep the dishwasher clean and functioning optimally.