.. Finding an ID card

The woman we're trying to save says that ID cards are all at reception.

True - they've not been left out in the open. Maybe they're locked away? (Locked away near reception, perhaps?)

Indeed - they're in the wooden cabinet behind the desk.

The key is nowhere to be found, so we'll have to try something else to get to them.

The notes we found earlier listed quite a few possible mixtures - maybe one of them could prove useful?

We're effectively looking for anything that can get through wood.