When I turn the disposal on and run the water at the maximum pressure the food does not go into the disposal without me using a plunger, (wooden or metal rod) to push the food through. It doesn't matter if it is one eggshell or more debris, it doesn't move. I use a metal plunger and am afraid I will lose my grip and it will fall into the disposal. I don't remember ever having a disposal that worked this way. It is a new installation.