4.7.1 Either the WD shall have a user selectable drying stage, or the instructions for use shall indicate that the device and the channels of the device shall be dried prior to storage in accordance with the device manufacturers instructions (see Clause 8).
NOTE 1 Automatic cycles in which the device is not completely dried are intended for use with devices which will be used without storage. Storage of incompletely dried devices can lead to contamination with, and growth of, microorganisms.
NOTE 2 Purging with 0,2 m filtered alcohol (e. g. 70 % iso-propanol) can be used to aid drying.
4.7.2 The quality of air used during the drying stage shall be at least that defined in 4.6.2.
4.7.3 When tested in accordance with 6.8 there shall be no visible droplets of moisture.