Just being cautious. I had a friend visit today. Long story short, before visiting me she went to a nursery notorious for spider mites. I did not know this

Good that you're being cautious! I always have a bottle of Dr. Zymes Eliminator in my stash of supplies... this or some Spinosad will take care of any leaf sucking insects (spider mites, aphids, thrips, whiteflies) and both are organic so they can be used right up to the day of harvest without any harm to either the plant or what you're smoking/using of your harvest. When you use either one, make sure you're spraying just before lights out. Good luck - hope she didn't bring any with her, although I feel it's pretty safe to say she didn't ... they usually don't attach themselves to humans and travel around like that.... so rest easy but prepare for the worst!