The practice of putting plates face down in the dishwasher is primarily done to prevent the accumulation of water or debris on the surface that comes into contact with food. By placing the plates face down, the water jets from the dishwasher can more effectively reach the soiled side of the plates, helping to remove food particles and ensuring a more thorough cleaning.
Placing plates face down also helps to prevent items from collecting water or detergent residue, which can leave spots or streaks on the dishes. By positioning them face down, water can easily drain off the surface, reducing the chances of water marks or residue remaining on the plates after the wash cycle.
Additionally, putting plates face down can help with the organization and stability of the items inside the dishwasher. It allows for a more secure stacking arrangement, minimizing the risk of plates tipping over or shifting during the wash cycle.
While it is a common practice to put plates face down in the dishwasher, it's always a good idea to refer to the manufacturer's instructions or guidelines for loading the dishwasher effectively and to ensure optimal cleaning performance.