Unreliable heart rate monitor

[Phil180]

After a period of a few weeks where the heart rate sensor in my charge 3 has been pretty accurate, it has all gone downhill again. I am doing absolutely nothing different and have tried a restart after switching off heart rate and syncing and then back on and syncing. 

Please help as it is driving me mad and I just want it to work during my workouts 😞

Phil. 

[Phil180]

Here is todays where the charge 3 completely failed. 

[Phil180]

Compared with a couple of weeks ago on the exact same training programme. Please note I have not changed anything so the fault must be with the charge 3. 

[Phil180]

Thought I’d add this from yesterday, not that anyone seems to be looking at it. It’s getting worse. £120 and not fit for purpose.