Answer:
I go up when the rain comes down
I am always around you but often forgotten. I am pure and clean most of the time, but occasionally rotten. What am I?
A large oasis in the desert. Come with cash and leave with none. What am I?
I let water fall on you while everyone else stays dry.
I am rarely touched but often held. If you are smart you'll use me well. What am I?
The answer I give is yes, but what I mean is no. What was the question?