hi guys,
probably posting this in the wrong place, but ive just noticed my time clock is running faster than usual, it was ok until today, reset it when it got to the car park at 13.40 for a 14.00 work start time, when i finished work i got back in the car at 22.04, the bloody clock said it was 22.20 something

is this a clock fault or something else
thanks guys in advance