Why are there water marks on dishes washed in commercial dishwashers?

I believe that many friends who have worked in commercial kitchen dishwashers have experienced that sometimes they find that the washed dishes have water marks. What is the reason? In fact, the reasons for the water marks on the dishes washed by commercial dishwashers may involve many aspects. The following is a simple summary by SHINELONG based on the feedback from various customers in the past and the solution experience. Water quality problem: High water hardness is easy to precipitate scale during high-temperature cleaning, and these scales will adhere to the tableware to form water marks. Solution: Use softening salt to soften the water quality and reduce the generation of scale. At the same time, according to the water softening gear setting of the dishwasher, select the appropriate water softening gear, and check and replenish softening salt regularly. Or generally regular kitchens will install water purifiers to ensure water safety, which can also effectively soften drinking water. Improper use of detergents: There are clear requirements for the use of detergents and drying agents. If the use requirements are not followed, various problems will occur. Solution: Strictly follow the instructions of detergents and drying agents for preparation. When using, remember that both detergents and drying agents need to be used together, even dishwashers without drying functions need to be used together. Detergent residue: Some detergents may produce white precipitate residue after repeated use, resulting in water marks on the surface of tableware. Solution: Use special detergents or food-grade citric acid to clean the inner cavity of the dishwasher regularly to remove residual detergent and other dirt. Poor detergent quality: Some customers purchase poor-quality detergents that cannot be cleaned thoroughly. Solution: It is recommended to choose detergents and drying agents from big brands or original dishwasher manufacturers when purchasing. Internal residual dirt: Dishwashers are used frequently, and oil and scale are easily left on the spray arms, drain outlets, pipes, and surrounding inner walls. These dirts not only affect the cleaning effect, but may also cause water marks on the surface of tableware. Solution: Clean the dishwasher thoroughly regularly, including the spray arms, drain outlets, pipes, and inner walls. You can use special detergents or follow the cleaning procedures of the dishwasher, and at the same time ensure that the kitchen water is clean. Improper placement of tableware: If the tableware is placed too densely or overlapped, it may lead to inadequate cleaning and leave water marks. Solution: Different types of dishwashers have different placement requirements. Place the tableware reasonably to ensure that each tableware can be fully cleaned. Dishwasher failure: If the above methods cannot solve the problem, there may be a problem with the dishwasher itself. Solution: Contact a professional maintenance person for inspection and repair. The above are the various reasons that caused the dishwasher to not clean properly and have water marks when SHINELONG was in the dishwasher after-sales service in the past. When using a dishwasher, you must remember to strictly follow the use requirements of the dishwasher manufacturer, choose qualified detergents and drying agents, and also ensure the hygiene of the water used.