How well are you maintaining your scissors?

 
A simple test once a week is to fill a bowl with water and place a single sheet of perm paper so it floats freely on the surface. Take your scissor and see if you can cut through the wet paper cleanly and effortlessly without biting or pinching the free floating paper.

If your scissor snags the floating perm paper especially at the tips it usually means that you were cutting with the shears too loose and prematurely dulled the blades.
LOOSE TENSION WILL CAUSE IMMEDIATE AND DESTRUCTIVE WEARING OF THE SHEARS!