Exchanged controller three times already any way I can fix controller myself?

My day one analogs feel very weird but i always get a second controller and i noticed its analogs were even worse out of the box then my day one edition so i exchanged it for a second controller and that one did the exact same thing but on the right analog stick. So as a final attempt i went to a different location and exchanged my controller and i was excited that everything worked accept when i tried the left trigger it was grindy and and made a terrible noise. I would like to know if there is any tutorials or guides i could do to just fix the dang thing myself im so fed up with these controllers.

 

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Last updated July 4, 2018 Views 3 Applies to: