These are what 10 years old at this point. The early ones are dried up and are in need of an overhaul. Unless you bought with paperwork showing a full PP overhaul, in the past few years, it is a fact of life. Service it and move on is all you can do, unless your seller gave you a warranty of some kind. I would not wait, either, as the day/date wheels are directly attached to the underlying gears so bending is occurring not just sticky stuck wheels.