Have you tried wedging the plug in place with the stove knob key? It won't work but the bent key might take your mind off the radar detector entirely....
Seriously this is a common situation. Wrap something around the plug such as a couple of turns of electrical tape (not over the contacts though) and that should hold it in place. An even better way to go would be to wire the device into the bike using the acc. leads under the top / left fairing cover if that works for you.
Brian
I've tried using my Escort 8500 plugged into the accessory socket on the dash but the plug won't stay in place for more than a minute or two. I've anchored the cord close to the socket but that didn't help. Has anyone else encountered this problem and, if so, how did you solve it?