I have a 08 Ford focus se, sedan, the radio stays on after taking key out,Aux/Cig dont work.so i have to disconect the power from battery every night. Otherwise it wont start in the AM.battery dead?

There's a good chance it's the ignition switch. Before replacing get some electronics cleaner. It comes in a spray can. Spray the key, insert, and turn it back and forth. Do this numerous times. You can also spray a couple quick squirts in the ignition. Be sure to hold a rag over the can while doing so to prevent spray back. You don't want to get it in your eyes or even on your skin so wear ppe. Before starting your car let it dry for 10 minutes or so.

If this doesn't work I would replace the ignition switch.

Hope this helps.