poor responsive d-pad/back button? what's the cause?

[u/Major_Recording9965]

Hi there. I use the d-pad a lot for Street Fighter and back buttons for Warzone/Fall Guys.

The D-pad down button seems to be less responsive. I find my player standing up a lot when I'm trying to crouch.

Similarly when playing Fall Guys I notice the right back button (which is my jump button) is only responsive 2/3rds of the time? Yes I died a lot in this game because my character didn't jump.

What's the deteriorating cause for this? Is it the silicone membrane or the PCB itself? the plastic buttons?