I read one thread about a stuck DTC button from a cola product, and they where able to fix the problem by getting access to behind the button by performing part of the TVandNAV2Go DIY
That would be me
and after I fixed the DTC button I realized I too have the same problem. My first 3 radio preset buttons have cola (or some sort of sticky liquid) in there as well. Honestly I rarely EVER use those buttons but considering Im anal I too need to fix those. It was imperative that I fix the DTC button since I almost always turn that off (I wish I could make it default to off
I think that the front of the radio panel pops off by using a wedge but I have yet to get in there. Maybe one of these days soon I will do it and when I do Ill post a write up about it.