So I usually store my frost sensitive bulbs in my basement during winter. It's cool, but I have a dehumidifier running due to it being unfinished and we get occasional water leakage from rain. Last year my bulbs all dried out by spring and died, I kept them in a shelf in the dark. Am I supposed to put them in a sealed ziploc bag with something (ex. Dry potting soil or sawdust)? Should bag be airtight or open for ventilation?