When I accidentally press the button, the light starts to increase and decrease in intensity and doesn't stop until I unscrew and screw the bottom back on even if I don't hold down the button anymore. I've tried pressing, holding, clicking the button again - nothing works, it just keeps going. Also, with these wands, Hermione's wands are somehow an inch or two longer than Harry's, short, thick, and bulky. The handle is almost too thick to hold comfortably.