Rinse aid is essential for drying. It reduces water surface tension so water sheets off instead of pooling. Check the rinse aid dispenser on the door and fill it. Many people don't know this exists.

Make sure you've selected the 'Heated Dry' or 'Extra Dry' cycle. Many modern dishwashers default to energy-saving modes that skip heated drying. Check your cycle selection.

Bowls and cups facing down trap water. Angle them on the rack so water drains off. Don't overload — dishes need space between them for air circulation.

The heating element is at the bottom of the dishwasher tub. After a cycle, it should be warm/hot. If it's cold, test it with a multimeter for continuity. A broken element needs replacement.

Clogged spray arm holes mean water doesn't reach all dishes, leaving food residue that traps moisture. Remove the spray arms and use a toothpick to clear each hole.

Some dishwashers use a vent fan to expel steam during drying. If the vent is clogged or the fan is broken, moisture stays inside. Check that the vent (usually top right of the door) opens freely.

Plastic items don't retain heat and always dry poorly. This is normal — plastic doesn't hold heat like ceramic or glass. Remove plastic items and dry them by hand.