My vines rarely get pooped on (actually, I don't think they ever have, but I only have one corn snake)... nonetheless, I like to soak them in a sink full of HOT HOT tap water with a bit of white vinegar, then when the water starts to cool off (about 15+ mins later) I rinse again with HOT HOT tap water, and let air dry on a few pieces of paper towel.
If it is not humid out, I will put the vines back in the vive with just a little water still left on the leaves (mind you, they are not dripping with water, and have cooled off).