Basically, if the seal is gone, you're screwed. My favorite condensation removing trick is to put the camera on the dashboard of your car in the hot sun. Works like a charm. In the winter and if you live some place with no access to said sun, then just keep waiting. Take out the battery and CF card and leave the access door(s) open. It probably won't go away. And if it does, it may very well return. You could take it in for repair, but you're probably better off replacing it, assuming the seal between elements is gone.