bosch dishwasher not drying?

I have a srv43mo3gb/15 bosch dishwasher which I have used for around 8 years in a medium hard water area. Initially I always washed at 50 degrees but after a few years it started to give me dishes that were clean but still wet. I found the 65 degree wash still dried properly so started using that instead. Now I've had a couple of washes at 65 which didn't dry properly so it definitely needs to be sorted out. Can anyone help?