Topic: pops and crckles starting to show up in recording

I'm on a stable mac pro running el capitan and logic.
I have had my UCX now for a good 7-10 years with no problems. Recently with no changes to my system randomly after a few days of recording serious pops and crackles show up consistently in my recordings. When I turn off UCX and turn it back on all is ok for a bit until they come back and the frequency is increasing. Any idea what might be happening?