After high-level disinfection, rinse the endoscope and
flush the channels with sterile, filtered or tap water to
remove the disinfectant solution. Discard the rinse
water after each use/cycle. Flush the channels with
70% to 90% ethyl or isopropyl alcohol and dry by
using forced air. The final drying steps greatly reduce
the risk of remaining pathogens, as well as the possibility
of recontamination of the endoscope by waterborne
microorganisms