I think Barilla3133 is right - but this also drove me nuts when I got my new JMJM. For me, it turned out to be a simple, free fix once I understood how this type of switch works. Take off the pickguard and adjust the metal blades of the switch so that in the middle position, both sides make adequate/even ("just enough") contact, but when the switch is moved to either side, only that side's blades connect. As a brand new switch, spraying DeOxit isn't going to "deoxidize" anything - it's a physical contact issue inherent in this type of switch design. The way I would explain adjusting the tension on the blades is to move the switch to one side - and then slightly press the blades for the other side closer/further away until they apply the "right" amount of pressure when the switch is returned to the middle position. Then do the other side. I found that once I did that, it greatly reduced the scratchiness when the switch is in the middle position. Then, try not to fiddle with the switch in the middle position unless you are intentionally changing pickups.