The customer advised that the punch circular cut (3712039) would not be returned for investigation; therefore, an evaluation of the device could not be performed.Lot number information has been provided; therefore, manufacturing records were reviewed and found no anomalies.The issue reported by the customer could not be determined.The issue of not cleaning through the rear port may be the result of a blockage or improper cleaning.If additional relevant information becomes available in the future, this complaint will be reopened, and the respective evaluation performed.Trends will be monitored for this and similar issues.At present, we consider this complaint to be closed.
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