Pretty much, just lever them off carefully with a penknife, etc.
Currently posting on I2, about to roll a fag, and I think go turn the heat down on the hotplate while my latest experiment brews and stews.
..not a moment too soon. I slightly singed it. A few minutes longer and it would really have overheated, bloody toluene boiled off. I'll give this a try and most likely go bag a couple more boxes of immodium from the local store. Bugger. I hope I haven't ruined my test-run at this.