In addition:

1)Leave water for her to drink all over the house.
2)Turn down airconditioner.
3)Search at night.
4)They usually don't wonder off too far from their hides.
5)Leave plastic bags on the floor along the walls, so you would hear them rustle if she slithers on top of them.
6)Make sure there are no open doors or windows nearby.
7)Leave a line of flour on your door ways, so you would know if she crossed from one room to the other.

Good luck.