Reply to Arturia keyboard fader problem (sends out midi values exponentially)

I know it might be hard to find some answers on a DJ site but on the other hand I know a bunch of you own a midi keyboard themselves so I'll give it a go:

I'm owner of an Arturia Laboratory 61 keyboard for some weeks now and I'm pretty happy with most of it.

One issue remains to be solved though:
The faders have a MIDI value range from 000 to 127. Normally you would expect the fader increasing the MIDI values linearly (linear fader curve) so that a fader being placed in the middle of its rail sends out a MIDI value of about 64.

8 of 9 of my faders do so but one does not. It increases the MIDI values almost exponentially which is very bad.
In the middle of its trail it sends out a value of 008 and from then on it becomes almost uncontrollable (it misses out some values and so on).

Any ideas to fix this would be highly appreciated!!!