When you replace the refill it does not come with a new spring.
Springs are available upon request.
Do not tap, use excessive force or drop your pen on its tip. When dropped the nib is pushed in and you loose the nitrogen pressure causing the refill to become erratic. To replace the refill , hold the Grip in one hand and the barrel in the other. Then twisting the end cap while gently pushing the the lead down with the tip of your finger. Be careful what is on your hands when you touch your pen since some caustic, sharp or rough chemicals can attack the grip or scratch the glossy surface of your pen.