Dishwasher leaves white chalky residue on dishes and inside the tub.

Safety first: No special safety concerns; avoid inhaling descaler dust.

• Fill salt compartment: Use only dishwasher salt and fill the softener compartment according to the manual.
• Set water hardness: Adjust the dishwasher's hardness setting to match your local water hardness so the softener regenerates correctly.
• Use rinse aid: Ensure the rinse aid dispenser is filled and set to an appropriate level.
• Descale: Run a descaling cycle with a suitable dishwasher descaler to remove existing limescale from the tub, heater, and spray arms.
• Adjust detergent: Use the recommended amount of detergent for hard water; too little can worsen deposits.