III Spy hint needed

[Peapod36]

I just started and I'm stuck! I'm in the jail with Michael Gower and I have the coffee. I gave the bloody bone to the dog and got the toy. Now what do I do???

[Scorpio_Phoenix]

A couple of posts down from this one there is already a new III Spy thread. Why didnt you just use that one?

[Kweepa]

Invisiclues:

Spoiler

What's wrong with the key?
It's not hard enough.
What is it made of?
Rubber.
How do you harden rubber?
Make it cold.
How can you make the key cold?
Put it in the bucket of water.

[close]

[Peapod36]

I'm sorry I didn't post at the other thread. I didn't think about it. Thanks for the hint. I knew it would be something obvious.