So glad I found this site. I’ve had my BackBeat FIT earbuds for 3 years now, and recently started getting the “sticky left button” issue. Until recently it was just the annoyance of the earbuds skipping my music tracks and hearing the voice repeatedly say “next track…next track.” But then last week they failed to power on, despite the battery being 100% full (blue LED after charging for a couple hours). I tried banging the left earbud on a desk a few times, then repeatedly pushed that left button until it got unstuck. Suddenly the power-on button started working and the computer voice said “battery full, headset connected.”