Shutter lubricants get hard or gummy if they sit for too long, so it’s a good idea to give your shutters regular workouts to keep them working smoothly. It sucks, but it helps avoid sticky shutters, which cause ruined photos and expensive servicing. I try to fire each of my shutters about 20 times on every speed (30 on the slower speeds I don’t use that much) once a month or so.
Today is my shutter workout day, lucky me!