Method of separating chemistries in a door-type dishmachine

A method of washing articles in a dishmachine comprising:

• a housing comprising a wash chamber inside the housing;
• a first tank in fluid communication with the wash chamber;
• a first pump for pumping fluid from the first tank into the wash chamber;
• a second tank in fluid communication with the wash chamber;
• a second pump for pumping fluid from the second tank into the wash chamber;
• at least a first mechanism and a second mechanism constructed to maintain a first composition and a second composition at least 90% separate during the method, wherein the first mechanism comprises a diverter plate selectively movable between a first position and a second position, wherein the first position opens a flow path from the wash chamber into the first tank and the second position opens a flow path from the wash chamber into the second tank, and wherein the second mechanism comprises a gutter plate comprising a central opening and at least two walls on opposite sides of the central opening each forming a portion of a recess positioned on at least two sides of the diverter plate;
• wherein articles to be cleaned are disposed within the wash chamber;
• the method comprising:
• A. filling the first tank with the first composition and filling the second tank with the second composition;
• B. spraying the first composition from the first tank onto the articles in the dishmachine;
• C. positioning the diverter plate to the first position, wherein at least 90% of the first composition sprayed onto the articles flows onto the diverter plate and into the first tank;
• D. spraying the second composition from the second tank onto the articles in the dishmachine;
• E. moving the diverter plate to the second position, wherein at least 90% of the second composition sprayed onto the articles flows onto the diverter plate and into the second tank;
• and
• F. spraying a fresh water rinse onto the articles in the dishmachine.