I can't get my oil filler cap off my jeep cherokee

i JUST had this same problem and could not find an answer, so I will post my solution for others to see as im sure you already figured this out.

mine was the type of cap that is like a medicine top, push down then turn. it was making a clicking sound when I turned it to the left, but not come off :(

i pryed it up with my hands and snapped off the top of it. there you will probably see stripped threads and a broken spring. don't panic, there is a lip on it you can simply take a big set of pliers (i used a pipe wrench) to twist the remaining bits out. then go buy a new one. i spent $10 on a stant. works WAY better than piece of junk that was there previously.