The shutter seemed sluggish in my Patent Etui so I screwed out the front lens element and removed the shutter face plate. I brushed a little Ronsonol on the shutter gears and gently scrubbed the shutter blades. That all made the shutter snappier, though the one second setting is still slow. I'm happy with that result. Removing the shutter completely and soaking it overnight might get the slowest speeds closer to the original specs, but I'm reluctant to risk pushing my repair efforts beyond a point of diminishing returns.