My key is loose and doesn't turn off completely leaving the power on to just the a/c lights and the power windows. By morning, the battery is dead. If I jiggle the key, then power shuts off and it is ok. What needs to be replaced?

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When I turn the key off, some power remains on. The A/C lights only and not the A/C, remain on. Also the power to the power windows is still on. So my battery is drained by morning. If I jiggle the key a little bit till the A/C lights go off, then the battery is ok the next morning. Is the ignition lock cylinder bad or the ignition switch? What need replacing and what does it cost? What seems to make the problem better or worse? Jiggling the key to turn off all power How long have you had this problem? A few weeks