One method I used to remove my BTA was to rub an ice cube at the base of the foot. Don't hold it on it as it will cause damage. Just rub it back and forth. It will irritate it and it will start to release. Once a spot has released then you can rub under the foot and eventually it will be off. It takes a bit of time, but has worked so far for me. My last one took about 45 minutes, but it was down in a crevice, yours looks much easier to get to.