I have two bench multimeters, the Fluke 8808A and the HP/Agilent 34401A. Currently I *much* prefer the 34401A and it's because the 8808A's buttons take a lot more physical pressure than I expect, meaning I sometimes have to press the buttons multiple times before they register. Is this a common experience with the 8808A or does it sound like I just need to clean the pads?