Wow, i learned me somethin' tonight! I was wondering why the heck my truck was always getting speckled with this clear sap like substance when I'm parked along the road under trees... It comes off easy enough as it seems to be water soluble, but i still don't want it on the truck! I thought it had to be the trees doing it, but I have never seen the sap drip in what looks like a mist on the truck like that... Damn aphids!