Left Ear Bud stopped working after 1 month - Same issue on 2 pairs

I purchased two of these for my sons. Shortly after 1 month the left ear bud stopped working. I also purchase a set for myself but found them pretty uncomfortable or had to wear them loose and sacrifice sound quality. A tight fit is imperative for sound quality with ear buds and I had to push these in so hard for it to sound decent they were not comfortable. I haven't wore them too much due to this but I would guess the left ear bud would stop working on this set also if I used them much.

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