New poison spray targets 'super-rats'
2 January 2014 Last updated at 11:38 GMT
The Midlands has one of the biggest rat problems in the UK, with households calling pest control experts more than any other region.
In some parts of the country rats are even becoming resistant to traditional rat poison.
Scientists at the University of Aston have created a new way to control the rat population using a poison spray absorbed through the rat's skin.
David Gregory-Kumar reports.