Solve these Riddles!

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Across
  1. 2. I am a box that holds keys without locks, yet my keys can unlock your deepest senses. What am I?
  2. 3. Iron roof, glass walls, burns and burns and never falls. What am I?
  3. 6. I have a head and a tail that will never meet. Having too many of me is always a treat. What am I?
  4. 7. I fly around all day but never go anywhere. What am I?
Down
  1. 1. Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?
  2. 4. I have a bed but I never sleep. I have a mouth but I never speak. What am I?
  3. 5. What gets wetter as it dries?