2 things you shouldn't do with a cotton bud

Professor Tom Stephenson, Head of the School of Applied Sciences at Cranfield University, explains "2 things you shouldn't do with a cotton bud".

Cranfield Water Science Institute (CWSI) are running related courses such as :
Emergency Water Supply and Environmental Sanitation
Introduction to Wastewater Treatment
Biological Processes for Wastewater Treatment
For a full list of CWSI short courses, visit http://www.cranfield.ac.uk/sas/water/cpd/index.html