Wrinkled Blue-Green Vase

This is one of my latest vases from class.  The wrinkling on the sides is unintentional.  I think I’ve discovered the cause: I’m going in too far to the gloryhole when I’m trying to heat just the lip, and it’s making the vessel wrinkle.  I had two, the other was nearly identical to this, but the bottom was cracked out because of too much glass on the puntie.  I ended up smashing it, as I was having a bad day and really needed to smash something.