Has anyone had the code E4 come up on their codefree meter and if so is there a way to get rid of it or is the meter defunct? The troubleshooting guide says it's temperature related but my meter isn't outside the range of 10-45C. More like high 20s here. It just suddenly stopped working this morning, I've tried new strips, battery etc. The strip icon comes up as soon as I turn it on but the minute I put a strip in it comes up with E4. Do i need to get a new one or is it fixable? TIA