Has anyone encountered such a stubborn boiler? Any more tips? I have access to an ultrasonic cleaner, could that help? My best guess is either it's really, really rusted and will need a longer penetrating oil soak or that the seals degraded and now there's some sort of freak rust degraded plastic mixture that has married the pieces together. Is it possible somehow that the metals themselves has fused? Is there any chance this isn't a usual righty-tighty/left-loosey thread?
Source : https://www.home-barista.com/repairs/frustrated-cant-remove-heating-element-on-la-pavoni-europiccola-t49358.html