I decided to test yesterday after a while of not bothering but eating still at low carb level. After a lunch of boiled egg and a mug of soup. Waited 2 hours, washed my hands and tested it returned a whooping 10.8. Quick panic as a very odd return, washed my hands again with more rigour and tested This time it returned the expected 4.8 Lesson learnt wash hands properly. Sigh. Once again thanks to the forum members for highlighting how this could have occurred.