I posted how you can fix that, it's pretty easy, and supposedly it's permanent. The older black controllers often have the problem. #racistand wow the ps4 controllers sure don't take it very well. iv only have the ps4 for a few months and the controller is l1 r1 sticky. ugh
Here it is again:
https://www.youtube.com/watch?v=fRu3qKcUECk&spfreload=10
I used a slightly damp paper towel to clean the rods. Worked like a charm.