My best friend's dad told me about this a long time ago:
For a long time he used a cheap coffee grinder to break up very compressed weed, for some reason, he had to try to clean it and he gave it to his mom. Even though he cleaned it a lot, the first few times his mom used it to grind coffee, it got her really stoned

I'm not really sure if this helps with what you're asking, but I thought it was an interesting story anyways :stoned: