Lately, my Stereo Memory Man’s bypass switch has been unreliable at best, engaging at random and frequently taking several taps to work. The nut holding the switch in place is tight and the power source I’m using (a Signal-Flex DC brick) presents no problem for other pedals in my chain. Anyone have any ideas? This pedal is sort of the heart of my looping set-up, so advice would be much appreciated. Thanks!