Wow, that's really strange - out of interest what colour covers do you use? maybe there was some manufacturing residue left on them?
I am mostly using the red ones
@Gordon started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Wow, that's really strange - out of interest what colour covers do you use? maybe there was some manufacturing residue left on them?