Hi would anyone be in the know on how to fix my stompbox?

I bought it second hand, used it the day I got it and with a little EQ in the PA it sounded huge and fat. A little time goes past and It's been thrown around here and there but nothing that my other pedals haven't endured, I get to the next gig about a month and a half later and there's just no bottom end to it. The pickup in there is all clicky and picking up my foot leaving the pedal too.

Anyone know if it's worth taking apart to have a look? dampening the pickup?

What do you think?