Don't just trash those short ink sticks! Use the ink stick holder, AKA ink stick clipper to hold your ink stick until very last bit. No more waste of ink sticks. ink sticks crack due to different humidity level in different regions. That is normal. But if cracked, broken, you don't need to throw the good ink stick away, just use this clipper as an extension.
It is a simple tool, but very useful.
Made from bamboo.