I use NAP spitfire mechanicals and have used the same one on 4 different deer. I change one OF the blades if it get outta shap in any manner.
After a kill, I take them apart,clean, wash really good,put a drop of oil on them and wipe it off.then I have a diamond plated finger nail file.it sharpens them with ease.I hit them until they shave with no resistants.put them into the carbon arrow and into the quiver.ready for the hunt.

"IF IT DOESN'T SHAVE CLEANLY,I DON'T PUT IT INTO AN ARROW PEROID".