Answer:
I am black when you buy me red when you use me when I turn white you know itβs time to throw me away.
Better touch me before you proceed to second.
What gets sharper the more you use it?
I'm at the head of an elephant and at the tail of a squirrel
I am a bow that can never be tied or broken but can disappear. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.