Any experience trying to take out an old lip implant (20~ years post-op)?

In 2006 I had a lip implant done in San Mateo Ca. From my research.. I'm guessing Advant? I've never liked it, it's hard and makes my lip stick out like a Simpson. I've been told by 2 docs to just leave it. Any experience with trying to take it out? Especially one this old?