Lizard glue / office supplies

“Did you have a episode like a super glue
get hardened so you couldn't use it ?”
Super glue sets hard when meeting air.
Therefore this phenomina makes the tap of glue hard open
and the mouth stuck with the glue every time.
lizard glue's solution is the cutting crack around the tip to make
a new mouth. In result, it makes more easy to remove the stuck tips.