4.3.3 Washing
The WD manufacturer shall specify the detergent(s) to be used (see Clause 8).
The detergent solution shall be discharged during or after each process cycle and shall not be reused.
The temperature of the detergent solution throughout the washing stage shall be monitored to ensure that it remains within the limits specified by the manufacturer of the detergent and be compatible with the temperature limits for the device(s) to be processed.
This shall be achieved either a) by controlling the temperature of the detergent solution or b) where appropriate, by operating the WD at ambient temperature with means to prevent operation of the WD when the detergent temperature is outside the specified temperature range.