I have the Garmin GPS 10D (bluetooth) and I am planning on using it to do some geocaching. While I'm not using it, I want to keep the GPS device in a back pack along with my PDA. My fear, though, is that the magnet inside the GPS unit (that is normally used to keep the unit stuck to the top of a car) will mess up my PDA.
I dont want to have to try to keep these two components away from eachother, so I was wondering if it is possible to remove the magnet. I dont see any screws on the device and I dont want to go prying the thing open if I'm going to ruin it.
Has anyone every tried this?

Any input would be much appreciated.
Thanks,
~Josh