My right AirPod isn’t working

Hi. My right airpod is not working anymore since a few days. I did lots of tricks to work it again. I reset it. I cleaned my airpod, I left it for few days. But I can’t get work it again. It’s not show on my iphone or not charging. When I put it into the charging case, The light of the case start to blink until I pick it from the case