Do you need to catch someone who you think is snooping around your private stuff? Check out the 'Clue Spray'. The spray however, is actually a powder which can be sprayed on any surface. The unique point is that the powder is invisible to the naked eye. Anyone who touches the surface will immediately have a trace of the film transferred to his/her hand. What's astonishing is that the film will remain on hands upto five days inspite of repeated washings. The spray can be seen when exposed to UV light -- a perfect way to catch internal thieves whom you suspect are upto something!
It is available at the site: http://www.advanced-intelligence.com/othersk.html
