Yeah, I've taken both my iPhone and Airpods into an Apple Store a couple of times and they cleaned the lightning / internal charging ports for free when the charging started getting a bit shaky, and haven't had any issues since. I'm slightly bemused that people don't think of this - a colleague was talking about getting a whole new iPhone because the lightning charging was getting a bit unreliable, but taking it in to get the port cleaned entirely restored it.

I'll keep it in mind when these fail.