Kenmore dish washer help

My lady friend has a Kenmore dish washer that is partially on the fritz. It is approximately 11 years old. The main problem is that it does not completely drain the water at the end of the rinse cycle. She also mentioned that the heating element for the dry cycle seemed to be staying on for longer than necessary.
Any ideas of what to look for to make it drain completely? Could the heating element be staying on longer because of the water remaining in the unit?
Thanks in advance

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