Something I did added static, UGH - HELP

Ugh, I don’t know what I did but now my audio portion of my interview has weird static and crackling. I’ve done what several youtube videos have suggested but no improvement. It wasn’t like this before so I must’ve applied some effect to make this happen.
Also, if you notice, the top row’s “dead line” (which is my audio) is thicker than the bottom rows “dead line” (which is my guest).
Any thoughts?

Audacity version 2.3.2
Mac version High Sierra
Screen Shot 2019-07-08 at 10.37.44 AM.png

If you’ve still got this problem, it could be: FAQ:Recording - Troubleshooting - Audacity Manual

thanks i’ll check it out.