Loosen a Control Dial

Eagle Eye

Recovering Full-Framer
CR Pro
Jul 5, 2011
194
65
Virginia
Hi everyone,

Recently purchased an EOS M on eBay. Downgraded from an M2 because Snapseed will edit RAW files from the M but not the M2. Sadly, the "functionally flawless" description of the M body was not completely accurate. The control dial on the back is extremely tight, so much so that I can't adjust the aperture or shutter speed with my thumb; the pressure necessary to turn the dial just engages the buttons. So I have to use two fingers. I got in there with a toothbrush and pulled some brown gunk out, which helped a little, but I suspect there's more. Anyone have any experience with this sort of thing? I've tried rubbing alcohol, which will be safe for the contacts. I'm willing to try gun oil next, but thought I'd check here to see if anyone has ideas. I'm probably going to find another M body if I can't get this fixed, so I'm willing to take it to the brink of breaking it if there's a chance of even a 90% fix.