Answer:
What can go up a chimney down but canβt go down a chimney up?
There's not a kingdom on the earth I haven't traveled over and over and though I know not whence my birth yet when I come you know my roar. I through the town do take my flight and through the fields and meadows green and whether it be day or night I neither am nor can be seen.
I destroy your home from the inside out.
Alone I am 24th with a friend I am 20. Another friend and I am unclean.
I am lighter than the material I am made of. You see parts of me but more of me is hidden underneath.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.