I got a couple tubes of this stuff last week. Get a free stick in the contest section while it lasts! My expectations were pretty low and I thought the idea was kind of gimmicky, but have been pleasantly surprised by how well it works. I have a 2 piece small titanium Space Case which is conveniently pocket-sized and works well for a fine grind. They tend to get gummed up more quickly than the 4 pieces in my experience, especially when they're getting bounced around in a pocket while full of herb. Doesn't take long before the nice smooth action is tough and squeaky. So I figured I'd try it out on the 2 piece, and applied a thin layer around the male lip of the grinder. It was pretty caked with plant matter but I didn't bother to clean it first. The effects were instant, and it was turning smoothly with ease. Big difference, impressive. Next I tried it on a 4 piece medium titanium Space Case. The lip was much cleaner on this grinder and it turned just fine to begin with. I didn't apply quite as much - only every other cm or so around the lip. The result was just as pronounced - the well machined pieces turned smoothly before but now it almost spun on its own with near zero friction. I guess you could say it was better than new. I like that it provides a buffer between the metal on metal friction, this would apply especially to the cheaper grinders. A week of use later the 4 piece is still turning just as smoothly, while the 2 piece has needed another couple dabs to maintain the same level, likely because I still didn't bother to clean it. The grease does mix in with the organic material on the lip, but personally I've never found that to be worth saving. It seems to be more plant matter than kif, especially on the 2 piece. I did find that it was easier to scrape it off with the grease though. According to Vapenstein's Monster, "Chronisuer Grinder Grease works on wood, plastic, metal, acrylic grinders to remove gummy buildup. It also works on fingertips, scissors and I use it as mustache wax. Chronisuer Grinder Grease is made with all food grade ingredients heavy on beeswax and hemp seed oil." I've found that it stays where it's supposed to on the grinder lip, but it's nice to know that the stuff is food safe. Overall I like this. It's one of those little things that makes a big difference. Seems like a stick will last a long time, too. Thumbs up from me.