I have a Redmi Note 8 with 3.5mm jack headphones. I connected them to my phone. My phone mostly does not recognize them. On some sides, it does. When I roll the headphones socket slowly in the jack, the sound becomes "blurry" in most positions. There is only a small range of positions in which the sound is HD. This down not happen in other phones, so I guess the problem is in the headphone jack. I tried using toothpicks and moving them inside, toothpicks with wipes, cotton swabs with nail polish remover which includes acetone, and more. I still have this problem. When I used wipes, I got a lot of cotton out of there and some dirt. However, I don't know much more what to do.