Replying to Marker Kingpin doesn't slide smoothly anymore

So I bought kingpins this summer and used them at Hood a few times and I think some dirt/ash has got into the slider track that allows the heel to go from ski mode to touring mode because it doesn't slide smoothly anymore and feels like there is some grit in there. So my question is, do I need to take the heel off the slider, clean it, and grease it? Or should can I grease it without taking it apart? Or am I complete dumbass and I should do something else?

**This thread was edited on Nov 11th 2020 at 10:35:34pm