Not wanting to lead you down yet another wrong path, I personally would try to remove the Tanglefoot with a fairly benign vegetable oil, such as olive oil, then wash it off using dilute soapy water, finally rinsing/flushing with straight water. I use this process to remove dirty grease from my hands. The process continually progresses from more harmful to less harmful. I would try to keep the affected area as small as possible, perhaps, with the use of a masking tape boundary. However, avoid peeling off the bark when removing the tape!