Never oil the antenna. It says so in the manual. You probably don't have it but you don't oil it because they made the antenna to such tight tolerances that anything in between would make it worse. Just try to bend it as straight as you can and see what happens. Most likely one of the plastic teeth inside the antenna is snapped off though. Happens a lot, you'd need a new mast to replace it. Ebay sells them for $10. No idea if it works though.