Hi, I usually remove stingers from any pipes that have them. Sometimes they come out very easily. Other times they need a bit more force with the help of some pliers. Occasionally they're really stuck in and can end up breaking off. I've found putting them in the freezer for a couple of minutes can help. Also, putting some alcohol around them to loosen any tar. I was just wondering if anyone had any other tips for getting difficult stingers out? Thanks.