Children are always going to find cunning ways to bunk off school, and the latest trick is to fake a positive COVID-19 lateral flow test (LFT) using soft drinks. So how are fruit juices, cola and devious kids fooling the tests and is there a way to tell a fake positive result from a real one? I’ve tried to find out. First, I thought it best to check the claims, so I cracked open bottles of cola and orange juice, then deposited a few drops directly onto LFTs. Sure enough, a few minutes later, two lines appeared on each test, supposedly indicating the presence of the virus that causes COVID-19.