If you have access to a hot air soldering station, use it! A temperature of 150°C is more than enough. At medium to high air flow, work your way around the earbud seam with a small to medium nozzle. This loosens just the adhesive and prevents any other parts of the earbud from melting or deforming. Also, you don't have to worry about burning yourself as much. I got mine off in just a few minutes with no problems and without any external scratches, you can barely tell that the earbud was disassembled.