Handy slowing down or jammed?

Recently my handy has started to slow down and it doesn’t make the same fast or wide range of motions as before. It’s as if the grease/lubricant for the machine has dried or become thick (haven’t looked inside) and trying to move it up and down manually also feels high resistance. How can I fix this?

Is there anything stuck in the slider? Wouldn’t hurt to apply some lubricant: Caring for your Handy | Ohdoki Help Center