ummm not too sure on that one, what i tend to do is tweak all the knobs and see what happens haha, but make sure you saved before you tweak loads of stuff, then if it doesnt work just go back to your saved track
One thing you could try, on the 'amp envolope' you have A D S R faders, try pushing the A one up, what its called is attack which means the note will fade in more the higher you push the fader up, it might lose that fuzz, but it could make the beggining of the note sound silent, so to counteract that try pushing the R fader up aswell, this is the Release fader which means it will hold the note longer after its finished the higher its set, it might cancel out the silence of the beginning of the note
Hope that helps a lil!