Teavana encourages you to put your nose over the teas. It isn’t like you can get a drinking sample of the teas there. So sniffing I think is the only way to know if one will like what they want to buy. @jackie what shop was this in?
When I head to the kitchen to blend teas or even package some for samples or sale I always clean the counters and sweep the floor (we do this every day as it is…we have three cats and who knows where they’ve been all day), and of course wash my hands before touching anything tea related. I just thought it was the right/natural thing to do.