If your dishwasher detergent already includes rinse aid, you generally do not need to add additional rinse aid to the dishwasher. Dishwasher detergents with rinse aid components are designed to provide a comprehensive cleaning and drying experience in a single product.
Rinse aid serves a specific purpose in the dishwasher. It helps to reduce water spots and streaks on glassware and dishes during the rinse and drying cycles. The rinse aid works by causing water to sheet off the dishes, rather than forming droplets that can leave marks as they dry.
Using a dishwasher detergent that includes rinse aid can simplify the dishwashing process, as you won't need to worry about adding rinse aid separately. Just make sure to follow the manufacturer's instructions on the dishwasher detergent package, including the recommended dosage and any additional usage guidelines.
If you find that your dishes and glassware are coming out clean and spot-free with the detergent that contains rinse aid, there's no need to add extra rinse aid. However, if you notice water spots or streaks on your dishes, you may want to adjust the dishwasher's rinse aid dispenser settings or consider using a separate rinse aid product to improve the drying performance. Always refer to the dishwasher's user manual for specific instructions on adjusting rinse aid settings and other dishwasher care tips.