SORTED. Pedal repairs faulty barber gain changer

frictionfraction

I have a barber gain changer pedals that developed a fault which meant it only came on sporadically and when it did there was an amplified click as the pedal engaged or disengaged. I had a spare footswitch so I replaced the old one which appears to have solved the intermittent problem but the amplified/microphonic click still remains. Can anyone pony me in the direction of someone who can repair it for me. thanks