avg/mpg /timer etc RESET BUTTON on right hand wiper stalk!

1998 A3 18T is the model everyone! im talking about the reset button under the right hand wiperswitch/ stalk !!of course,, which resets and controls
the digital centre part of the dash instrumentation, like stop watch/ average / fuel consumption etc well mine will not reset it ,like i said ive striped the backing off the stalk to reveal the inside in which i have checked and cleaned ,but still isnt working ,so cud it be the dash instrument it self anyone plz help
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