Why doesn't my phone charge right?

Does the cable actually sit flush with the bottom of the phone? If not, there’s still debris in the port. Generally my advice for cleaning the port is, get something thin, sturdy and non conductive. Toothpick works well enough. Use a flashlight to check and see what may be in there, sometimes it’s hard to know what it’s supposed to look like. But usually you can tell if there’s lint or other debris in it. Aim straight for the back of the port. Usually that’s where stuff is going to collect since it’s picking it up from a pocket or what have you and getting compressed into the back of the port when you plug a charger in.

If cleaning still doesn’t work, sounds like you’re in the market for a new charge port/dock flex assembly.