this was also posted on the link above but u may not have seen it since its on the 2nd page.
This is how i catch mine. Mine gets out all the time. But I allow it to , sometimes. Don't go out and buy this stuff just improvise with what you have handy.

Take F/T or live (bait) whatever yours eats, Put it in a aquarium with screen lid on it so the smell of the rat can get out. Then just get some plastic cups and put some coins in them and place them on top of the tank and or around it. Trust me it will Knock one of them over and wake you up.
You can variate the method to suit your needs.
You can also put cups of coins around the walls of the room since this is usually where they like to travel. Much like the plastic bags Ash mentioned, I just find that a cup of coins hitting the floor will pretty much wake the dead. You can also try using a fan to blow on the mouse so it will get the smell of the mouse throughout the house. Try setting the cups precariously at a tilt to where they are just about to fall over.
To even go simpler you could just put your bait mouse on a plate and place it on top of a cup of coins.

with a house that empty I would also use the flour method as mentioned above.
PM me if you like.


Good luck