I think it's a find line. If you get the backing paper damp it comes off easily, but I find if you overwet it (I know not a real word), it seems to come off in annoyingly small pieces.Steamer has always worked fine for us, it's still a ballache of a process but better than standing and scraping tiny bits off at a time!
true always worked for me in fact bought a cheap one from screwfix worked lovely just dont get the wall too wetI think it's a find line. If you get the backing paper damp it comes off easily, but I find if you overwet it (I know not a real word), it seems to come off in annoyingly small pieces.