Thank you for the link. I forgot that Sedsti has them.
I don't cover them at all. From what I can tell, the ports are as clean as they were when I first purchased the sabers - which means 4 to 5 years ago.
When they're unused, I always plug in the charger, so dust and dirt can't get in. And when I'm outside, they're mostly covered by my hands...
Maybe I am just overthinking it snd over worrying about sweat or whatever getting in the port and ruining my beloved saber(s).