try using an oven degreaser... that may work

Have you tried using a soft scraper of some kind to try and peel it of without damaging the teflon? I did that with something and i sat for over an hour just peeling it of with my fingers and putting scalding water in at the end, some people also sa that vinegar is good though i dont know how true it is

my mom gets so mad at me when i use metal in her teflon pans...

Did you try hot water with dishsoap (warm the water w/soap on the stove)? Or a Mr. Clean Magic Eraser? those might work. And to keep this from happening in the future, always use a HEAVY pan, preferably a tri-ply stainless pan! I never burn anything to the bottom of the pan. Once while in culinary school, one of my chef/instructors said that if you can pick up a pan with one hand to hit your spouse over the head with it, it's no good! lol

Have U tried Ammonia yet? Let it soak with a dish cloth contacting the surface to "Wick up" the Ammonia keeping it moist & then use a "Scotch Bright Pad" on it Gently!!! If this doesn't get it, this Will, but it IS Dangerous! U can take the pan outside and use a little "Paint Thinner" on it with a "Scotch Bright Pad" GENTLY!!! If stubborn, let soak. Be sure to keep away from Everyone & Everything!!! John

I found this for you. This article was written by Anne Field, Extension Specialist, Emeritus, with references from DuPont Corporation." "Staining occurs from charring of food/grease residues in the pan. Dark, widespread staining, the result of overheating and incomplete cleaning, may lessen the effectiveness of the non-stick property. The non-stick surface can be "renewed" and stains reduced or removed with commercial stain removers or by the following home remedy: Mix two tablespoons of baking soda and a half cup of liquid household bleach with one-two cups of water, or enough solution in these proportions to about half fill the pan. Simmer this solution for five minutes in the stained pan. Remove from heat and check the pan surface. If the stain still remains, repeat the treatment. CAUTION: The solution will foam and if it boils over, it may stain the outside of the pan. This solution is a strong oxidizing agent and will cause some change in the color of Teflon, with dark colors becoming lighter. This bleaching effect does not reduce the non-stick performance of the pan. Do not substitute ingredients for the baking soda, household bleach, or water. After the cleaning/stain removing treatment, thoroughly wash, rinse, and dry the pan; then wipe it with cooking oil to "condition" before using it again. Should a white-spotted film appear it probably results from minerals in the water and can be removed by saturating a soft cloth with lemon juice or vinegar and rubbing over the finish. After wiping, wash the pan, dry, and "condition" as you did when new."

First its not the fault of the oil. its the pan you used. a Wok gets hot no matter what oil you use. but a vegetable oil in large abouts is ok in it. if you put too little oil in any pan it will burn.