That's the touble with this shit though NAT'. The stuff this guy is on about is not actually sand, but very fine glass particles. The kind they put into road marking paint to make it sparkle. Some of this shit is so fine it can enter your bloodstream, and make its way to your brain.
There were several warnings in hospitals and doctor surgeries all over my city about a year ago.
Now, they're using sugar water to spray the buds. THEY, btw, are the Dutch. I only buy English bud (bud that's grown here), it comes a little damp (dries perfectly when left in the air for a few hours), but it's better than dying.