Cut off any remaining stems and dig the bulbs right away. Bruch off any excess dirt, and let them dry indoors. Brush off any remaining soil after they dry with a brush like a whisk broom. Place them in some cardboard shoeboxes or paper bags filled with sterile potting soil and put them into cool storage. Pick a spot that gets and stays very cool but doesn’t freeze and thaw repeatedly…a cool basement usually works or a garage that is attached to the house that never freezes. Plant in spring one the ground thaws and warms a bit.