Replaced battery, now only charges with wall power, won't sync

Hi there,

Ordered a new battery on the site, installed fine, minus one of the adhesive strips breaking while removing. a heating pad and careful use of a grocery loyalty card did the trick. Nothing seemed to break, no sparks, and I even still have touch ID. That's all good. When I turned my 5S back on it was at 50%, so I used it until the phone fully shut off, then went to charge it. Won't connect to iTunes on my macbook, won't charge while connected to the computer. Okay, wall chargers exist, and it now charges fine. But I'd like to be able to sync it still.

I read something about the foam on the top of the battery connector, so I popped it back open today and yep - no foam on the new battery. Couldn't get it off of the old battery, so I put tape on the bottom of the battery bracket to prevent contact. Still, same thing, will not connect through usb.

This is my first iPhone fix, so I'm willing to accept if I nudged something bad somewhere. Just wondering if there is anything else I should try? I am going to grab a little brush to clean the contact while I'm out today, but is gold contact cleaner alright, or should I get isopropyl instead?