I LOVE Wah-Wah. Man thet pedal rules. But I don´t like to do the standard wahwahwahwah up and down thing. Somtimes it´s good but not when playn´ solos especially faster solos. Check out Zakk´s wah wah technique.

I alway have it around middle point and slowly goin´ up and down (not all the way). Otherwise it can be messy and hard to hear what I´m playn especially when plan´ faster. Doing like I do makes the shred picked tones sound much better than whitout wah.