Hello, I am new to this forum, and I have a problem with my newly bought Dunlop crybaby wah pedal, it makes wired scratchy noises when turned on, I know it doesnt come from the guitar, because it doesthe noises even if I completly unplug the guitar...

Here is a video of it : https://youtu.be/biwPzcFHhlI

So do you all think that I did something wrong, or is there maybe something to fix ? Or shoulld I just go and return it ?

Thank you for your help,

Edgar ^^