I have had this same issue with two products from Anker. First it was earbuds by them. I noticed one day at work it seemed like there was no sound, I checked and there was sound, just VERY low. I also keep my earbuds cleaned regularly and there was no buildup on either earbud. Now, I have earbuds that wear around your neck, and I am having the same issue. It was the right one at first, now both earbuds volume are VERY low. I really like Anker products, but seeing as how this is my 2nd pair that is now doing this, I don’t think I will be buying anymore products from them. Also, the first pair had warranty on them, and when I called to utilize my warranty, they said I would have to have a receipt from where I purchased them, which was walmart, and without that receipt they wouldn’t/couldn’t help me. So yeah, no more Anker.