Happy Birthday ICMag! Been 20 years since Gypsy Nirvana created the forum! We are celebrating with a 4/20 Giveaway and by launching a new Patreon tier called "420club".
You can read more here.
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ABSOLUTELY!! (Pun intended) . . It's certainly worked for me, even older than that. At worst it'll be partially decarbed, making the consistency slightly runnier, but it'll still clean it up. . . :-D