I would also suggest heat. Either a heat gun or a hairdryer. Obviously, the hair dryer is less dangerous, and I think would be better for a first timer(or me).
You may also try different solvents to remove the residue. Maybe xylene or mineral spirits(both will work more or less similarly) first. If that doesn't work, try lacquer thinner or acetone, but be careful with them, as they may damage the material. Test a piece first
You may also try different solvents to remove the residue. Maybe xylene or mineral spirits(both will work more or less similarly) first. If that doesn't work, try lacquer thinner or acetone, but be careful with them, as they may damage the material. Test a piece first