I think you need a transport overhaul, which involves breaking down the transport mechanism into individual pieces, cleaning, replacing worn parts with suitable replacements, and assembly with proper lubrication.

When I had this done last year, my tech sent me photos of my failing transport gears laden with grease, then broken down into individual pieces before he put the system back together. At least one important spring was fatigued, which he replaced. He said that no grease should be visible with a properly lubricated Rollei.