Dishwasher Performance Diagnostic & Solution Kit

The user is experiencing persistent dishwasher residue despite trying numerous troubleshooting steps (detergent, salt, rinse aid, cleaning cycles, filters, spray arms). They suspect a broken water softener or other complex issue. This indicates a gap in the market for a comprehensive diagnostic tool or service that can pinpoint the exact cause of dishwasher problems when standard fixes fail. A 'Dishwasher Performance Diagnostic Kit' could include tests for water chemistry, detergent efficacy, and provide tailored, non-software solutions.