Porous and perennially damp, kitchen sponges never stood a chance against the microbes lurking within. The programme Talking Point finds out the best way to clean them and if the material matters. SINGAPORE: Here comes a dirty little truth: Your toilet seat may be cleaner than your kitchen sponge. At least, that was what lab results indicated when a typical, two-week-old sponge was put under the microscope by Marchwood Laboratory Services senior microbiologist Isaac Leong. It was one of 10