Does anyone know how to remove the stock antenna from a 2011 f150? I have a late model 2010 f150 and I just bought the "stubby" antenna from cravenspeed. I went to remove the stock antenna, and it WILL NOT come off. It just keeps twisting and twisting, without getting looser. Can someone please help me?

 

My '09 twists right off. Easy enough that the car wash twists it off before they send it through and then just re-tighten by hand when it comes out the other side.