I use heat and acetone. Works well enough for me and fairly quickly too. Never tried Xylene. Might have to next time. Exotic sounding chemicals that I’ve never used make me a bit sketchy... Someone told me to use MEK (MethylEthylKetone) once, but after reading about it, I decided the risks weren’t worth it.
I like to use stuff I can use in my house where the risk of blowing my house up is low or nonexistent and my fingers won’t get frozen off at the same time.