I have a Hario coffee scale that is absolutely maddening. It works just fine, but gives absolutely no feedback (no flash, no beep, nothing) when you press the '

I have a Hario coffee scale that is absolutely maddening. It works just fine, but gives absolutely no feedback (no flash, no beep, nothing) when you press the 'tare' button, and it also waits about a second before updating its display. The button itself doesn't have any tactile feedback either - one of those membrane-type buttons that seems to have a pressure sensor, but no 'click'.