Do HRMs degrade over time? I have the basic Garmin Dual, have used for 3 years or so and it’s mostly been fine. I only use it with the bike. Recently, it’s had a really hard time pairing with my trainer. I changed batteries recently so that’s not the issue. I wet the back, and it used to connect fairly easily. Now I spent upwards of 10 minutes trying to fidget with it, sometimes still to no avail.
I’ve thought about upgrading anyways, although not sure if a superior HRM would function any better?