When I purchased my SonicCare it had a nice hum, but shortly after it started to produce a loud and annoying buzz. It still worked but was annoying to use. After watching a bunch of videos where people used pliers to open them often damaging the bottom, I decided to make this video to share a less invasive method for opening it. I also found a hack that has made my SonicCare much more pleasant to use. Thank you for watching!