Hello. I've had my iPod for 1,5 years now and all was well until the moment I noticed the clickwheel had accumulated dirt inbetween the center button and the remaining portion of itself - basically, it means the center button is constantly being pressed, so you can imagine how good that is... How can I take care of this? Can I clean it in any way from the outside? Disassemble it (just for cleaning purposes)? Is there a place I can take it for cleaning (I live in Portugal)? Any help is greatly appreciated.