Why is my Note 3 charging properly ?

A

AC Question

I have had some issues with my phone while charging since it got some lint in the usb port, it looks clean now, but still wont charge like it's supposed, while i'm charging it, it chages really slowly, last night i plugged aroud 10pm with 6% of charge, and today at 7:30 more less had 89% of charge, also, if i'm charging my phone and using it the battery wont charge it will go down instead.
I really need some help with this !! :c