Beware plastic grinders, I only just noticed, but my grinder must have started to grind off into my bud, and I started getting a very industrial/chemical taste, I thought the bud had been tampered with, but when I stopped using the grinder, there was no chemical taste... BEWARE!
Acrylic grinders may leave small pieces of plastic in your herb and we all know that plastic is toxic so it's best to stay away from acrylic grinders.
That's why you should pay the excess for a decent grinder. High quality grinders can last you a lifetime and you won't have to worry about toxins in your weed. Stay safe bro.
Cheap metal ones can do this too, it's a bitch to pay more up front for a grinder but so worth it in the long run!