radio keeps playing

Radio keeps playing after I take key out and open door. The Microswitch is stuck on the door. Anybody else have this problem with an 02 cavalier?

when a huge chunck of ice built up there i did. pull it out.

I had the same problem a few months after having my car oil guarded. The door censor got kind of gunked up, I just sprayed it with some wd40 and plunged it in and out a few times and it started working again.

does ne1 know if this would be the same on a 94? mine does this occasionally(less since i replaced head unit)