Volume pedal repair in Seattle?

[Pete Martin]

I have a Fender volume/tone pedal. It has a scratchy sound at the very start of any movement to higher or lower volume, enough to make it unusable on gigs. I have taken it (4 times) to a place in Seattle that has always done good work for me in the past, but each time I get it back, it has the same problem.

Does anybody have a suggestion for someone in Seattle to take this?

Thanks,
Pete