Kenmore 110 20912991, 90 series, top load washer. With switch set to one rinse, the washer started doing second rinse. Does this suggest bad timer, or bad rinse selector switch. I sprayed contact cleaner on switches.... did not help. Other than this, washer works well and is not a rust bucket. It had a new transmission about 2 or 3 years ago. Am not in a position to afford a new washer now. Any ideas would be helpful, please.