I'd dig up the corms and cut off the foliage leaving about 2" of the leaf stem but leave the roots. Just shake off the soil and put them in a warm place to dry for a couple weeks. Once they are cured store them in peat or sphagnum somewhere cool and dry over the winter. I wait for a frost to kill back the foliage on mine before I dig them up.
Karyn

So... it's not dead yet...... Really!!! That's terrific! nice to hear that! Question, though. Drying the corm for a couple weeks will not make it dehydrated and die? I am sorry for asking the question, but I learned not to get the roots of any kind of plants dry. After I dig it out and shake the soil off, can I directly transplant it into a pot and put it indoors? Thank you very much

The corm is a storage organ, not the same as roots, so it can be stored on the dry side, but there should be some humidity or the medium should be very slightly moist to prevent the corm from desiccating. New roots will grow when it warms up.

I leave mine in the ground and they come back every year.