I did clean it out, but will certainly check again and be more thorough about it @SZak2015 and I appreciate such detailed instruction on how to go about it! However, neither cable will charge my sons iphone 7, either. We have different phone models (mine- iPhone 6s), and the same OS (@Kopra_12). I did consider that both phones were dirty, and cleaned the both of them with the first go around of scratching my head (@elmo41683) . Nonetheless, mine charges just fine with any one of the off-brand aftermarket cables I have (@amada.haro) . I’m sure it would be the same with an Apple branded one with that in mind (@ElectronWrangler). But I haven’t seen my OEM cable since my phone first hit the market, so I can’t confirm.
@Serg1023 brings up a good point about how it’s handled, and while I am guilty of treating some of them like garbage with leaving them wherever and tangled half the time, it’s only the dozen or so cheap, generic, throwaway, freebies that I’m careless with. I keep my Anker cables plugged up and stored into the same place at all times (except for checking to see if that’s causing the issue) and keep them neatly put away with the little Velcro strap securing them. While I can certainly understand the pillow thing @Serg1023, which is a good, warranted point, mine stay put on my nightstand when charging. I never answer the phone when it’s charging either (or anytime, really!), so it’s not getting tossed around that way.
One thing that’s curious is that this isn’t the first time, or the only Anker cables affected. Also that it’s ONLY my Anker cables I have this problem with. I’ve had others (more than my fair share) that over time I’ve tossed with this exact same issue, and with each one, I’ve followed the same method of troubleshooting to no avail. Another thing that may be helpful, something I noticed when brought up before, is that on every cord the 4th pin is blacked out. I assume this is crud and constantly clean it. But again, none of my other generic, after market cords have that problem.
Indeed, I’m at a complete loss!
I highly appreciate everyone here for chiming in with ideas and suggestions! That’s one thing I love about being part of the Anker community, and happy to have such wonderful people willing to extend a helping hand 
