The flexible rubber door seal or gasket on a residential kitchen dishwasher typically lasts between five and ten years, depending heavily on daily usage frequency, water hardness, and maintenance routines. Over years of thermal expansion from hot wash cycles, exposure to harsh dishwasher detergents, and physical compression every time the door is closed, the rubber gradually loses its elasticity, hardens, cracks, or shrinks, allowing water to seep past. You can troubleshoot seal wear easily by feeling the rubber texture. You can verify that your corrective action is successful when inspecting the gasket for cracks and replacing a degraded rubber seal stops water leaks entirely during a normal wash cycle.
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