2. CERTAIN ITEMS MAY NEED 2 CYCLES TO ACHIEVE DESIRED FINISH. THE WATER AND SOLUTION MAY NEED TO BE CHANGED IN BETWEEN CYCLES. THE DETERMINING FACTOR HERE IS BASED ON THE CLEANLINESS OF THE PIECES PLACED IN THE BOWL, PRIOR TO START OF THE PROCESS. ITEMS SHOULD BE CLEAN OF INVESTMENT PARTICLES AS WELL AS ANY OXIDATION ON THE SURFACES; OTHERWISE, THE SOLUTIONS WILL BE CONTAMINATED AND WILL NOT PERFORM TO ITS POTENTIAL.