I have a music exam tomorrow and my Boss Digital Metalizer MZ-2 has decided to **** up at the last minute. It's providing some serious feedback and makes the tone sound disgusting basically. I'm using it with a Squier Strat which has the default pick ups in and an amp with no name, the amp is fine though. I've tested it with different leads and when I plug directly into the amp, the tone is nice. I need this pedal for my exam tomorrow and without it I'm pretty screwed, so does anyone have any idea as to how to get rid of this feedback? It seems to be related to the 'level' knob, the feedback will become louder than the notes and just has this really fuzzy ringing sound and yeah you get the point lol. Anyone know what's going on?