Dishwasher Detergent Use and Water Hardness
Dishwasher Detergent Use and Water Hardness. Using the right amount of liquid or powdered detergent is important if you're not using a detergent pod, tablet, or packet. Soft water requires less detergent, since too much detergent can cause etching of glassware. Hard water requires more detergent to get good wash performance.