Subject: Where do the trails on the condensation of the inside of a bottle come from

I would get a bottle of water and drink half of it. I would let the bottle 
sit on my desk, and in the morning the bottle has condensation on the 
inside. but there are little trails, one droplet wide and about two inches 
long, and several of them. they are mostly going lengthwise and they are 
together in strands. What makes this happen, is it cosmic rays?

Re: Where do the trails on the condensation of the inside of a bottle come from