Answer:
Keep doing me to avoid lens dryness
I have a head but never weeps. I have a bed but never sleeps. I can run but never walks. I have a bank but no money. What am I?
I transfer oxygen from the atmosphere to your blood
Who makes it, has no need of it. Who buys it, has no use for it. Who uses it, can't see it. What is it?
What goes up a chimney down but can't go down a chimney up?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.