Ant-traction

My bloggy friend Fiona has had a very strange recurring problem: she keeps finding ants on toothbrushes. Only Colgate toothbrushes of a particular type are affected, and it doesn’t matter if the brushes are used or new. Ants seem to love the rubber on these. They’re ant magnets!

Being a rational creature, Fiona has been trying to find out why these ants love the rubber on the brushes so much. She recently ruled out Colgate’s (already shaky) explanation that it was related to toothpaste residue when she found the ants on a bunch of unused brushes. So if that’s not it, then what ? Anyone have any scientific explanations? Read both original posts and their comments for more info.