'Smart home' monitors hygiene habits
15 October 2011 Last updated at 09:08 BST
Dr Val Curtis, of the London School of Hygiene & Tropical Medicine, shows the BBC around her "smart house".
She shows how the toilet, sink, soap and toothpaste in her bathroom are wired up to a central computer so that she can monitor her family's hygiene habits.
The system is part of a research project to track our daily behaviour.