Some type of lube would certainly be of help.
Get it in there and work the moveable parts around until they get easier to move about.
Flush out any debri until it rinses out clean,then find some new ones to practice on.
Good luck and keep on pickin.

What is the best way to educate the masses? ... " A television in every home."
What is the best way to control the masses? ... " A television in every room."
From "Charlie" AKA " Flowers for Algernon"