Just don't do what I did. I sprayed electronic contact cleaner in the phone usb charging port. I lost my phone microphone. It turns out that was a non-serviceable part. Could still talk on speaker phone, and would work with blue tooth, but I replaced the phone. I kept it as a spare. It still syncs to my account so it's available if my replacement goes down for any reason.

Oh, the real fix to get it to charge? Dig out the lint in the port.