What do I need to block the chimney?

Hint 1 of 8:

You need something to put in it.

Hint 2 of 8:

But first you have to remove the cone.

Hint 3 of 8:

It's too hot -- you have to find a way to cool it down.

Hint 4 of 8:

Water could do the trick.

Hint 5 of 8:

Go down the stairs.

Hint 6 of 8:

Take what you can out of the water.

Hint 7 of 8:

There is a boat hook within reach,

Hint 8 of 8:

and a bottle that's not entirely within reach,