Our washing machine has started taking a really long time on the wash cycle. It used to take about an hour but now although the timer says an hour it can take 2.5 hours. At times it can say it has 1 minute left, then a few minutes later will say 40 minutes. My wife did fiddle with various buttons while trying to remember how to turn the finishing beeps off which seems to coincide with the longer wash times. Any ideas?