How often should I run the Clean Washer cycle and how do I know when it's needed?

You should run the Clean Washer cycle at a minimum once per month or every 30 wash cycles, whichever occurs sooner. The Clean Washer LED will flash at the end of a wash cycle when the washer has run 30 wash cycles as a reminder to perform this maintenance. If you do not run the cycle, the LED will stop flashing after 3 more regular wash cycles and then flash again after another 30 cycles. (Pages 14–15)