If they glued that on with 100% silicone you will have a bugger of a time getting it off. I've tried to remove stainless steel sinks set in silicone and it's near impossible. If you can get a vise grip on the track and pry it up a bit, maybe you can cut with a razor, utility knife. Some adhesives loosen if you use a heat gun. I've never used the wire method, but that is how they remove auto windshields. Go to a music store and ask for a really thick, unwound "G" guitar string. Use cowhide gloves to prevent the wire from slicing into your hands.