Wash Test- WCET can be considered as a kind of simulation which performs like dried form of blood on stainless steel just like in surgical instruments after operation. In order to make conditions harder, WCET is placed inside a plastic frame.
The test plate inside the frame and the surgical instruments are exposed to washing cycle together. In order to get an optimal test result, the plate must be perfectly clean in order to guarantee the instruments cleanless.
In case of inadequate test result, optimications and immediate measures can be applied for each washing cycles. After solving problem, repeat the test.