My one year old AirPods Pro has a problem charging the left ear pod. And, this is my 3rd AirPods in as many years. I have promised myself that I won't buy another one once its battery dies like the previous two AirPods.
It's well known that the contacts occasionally need cleaning, and there are all sorts of tools to do so that cost barely a few dollars.
I have cleaned contacts everywhere with electronics alcohol wipes. I see that the pins inside the left holster are not as protruded as they are on the right holster of the case. I have tried to pull it gently with a tweezer but it has not helped. Its 1 year warranty period just expired as well.