Definitely heat something up, whack it in and let it set then unscrew.
Easiest option Shirley?
Can heat the screw driver or whatever on a gas hob if no blowtorch available.
Yes. Shirley. But don't go overboard and push a white-hot screwdriver into the plastic or you might make some nasty fumes, and maybe sink in too far and melt the plastic threads. Then you've just got a toxic mess.
@Ndeipi started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Definitely heat something up, whack it in and let it set then unscrew.
Easiest option Shirley?
Can heat the screw driver or whatever on a gas hob if no blowtorch available.