Cannot find a Serial.println() in VS code

Hi all,
It seems like there is a line that is being printed in my code but I cant find it using the workplace search function in VS code (ctrl+shift+F).


I can only find 2 prints containing strings, but I see zeros continuously printed on my terminal


I have tried a make clean to see if an old version of the code was compiled, but no luck. I am looking for other tools that can help me find the hidden code.

I also have quite a few custom libraries in my workspace, does platformio search in those files when using ctrl+shift+F? thanks!