Answer:
There is one in every corner and two in every room.
What is born on the ground but floats to the sky, to be returned back again from the clouds up high?
Long and thin, red within, with a nail at the end.
When it's dirty this should never be aired in public.
You can't keep this until you have given it. What is it?
What never gets any wetter no matter how hard it rains?