MANAGEMENT students at Heriot-Watt University are promoting a Norwegian-made tongue scraper to get rid of bacteria which can persist despite careful brushing of teeth and gums.

Project leader Peter Musaeus said: ''Brushing without cleaning your tongue is like washing your hands then drying them in a dirty towel. If you don't clean your tongue you'll get halitosis.''

TSB Scotland is offering #1000 project prizes.