My Big Muff is struggling.

I decided to rock out with my Big Muff Pi today, which I had bought only 2 weeks ago, and the distortion effect didn't work. If it is set to ''Dry'', only the dry sound is coming out of the amp. It worked yesterday, I've tried different wires, 2 different basses, I've tried both ''Dry'' and ''Effect'' outputs. 0 results. I still have the stock 9V battery, if it has something to do with the case here. I'd be glad to hear any kind of solutions to my problem.