buzzing sound issue i've been getting from my right front side of the speaker. I've tried different things....(it sounds like when you put your phone near your computer speaker and makes the electrical interference sound)

1. took off my aftermarket hid kit
2. disconnected speaker from the front right side near the front windshield on the frame pillar?

Today it was raining in San Francisco, so i had to defog my rear window and guess what? whenever i press the switch the sound comes on even worse....
when i press the button to turn on and off and when it's on.... ZZZZZZZZZ sound....

srsly what could be the issue? Any audi tech on the forum that can kinda help me?

Some things that i have changed in the past on my car or done to it that i can think it's related to somewhat electrical?
-AWE boost guage
-Try to swap front seats with a sports one but didn't work out well so put my premium one back due to sports seats not being powered seats.
-Changed my headlight switch to audi TT ones with chrome trims
-Dice for my bose syp

As far as i know the sound has been there i think...