I use 91% isopropyl alcohol, Just drain them and put them in a plastic zip lock bag and cover them with the alcohol squeeze out the air and zip it shut. They will cure out fast and you can keep them in the refrigerator. They toughen up and become a little leathery and they stay on the hook really well. The isopropyl alcohol is the main ingredient in the dry gas that you buy to take moisture out of your gas tank, it pulls the moisture out of the minnows and that is how it preserves them. Give it a try with a few and I think you will be pleasantly surprised. Keep them on ice while fishing and put what's left back in the freezer or refrigerator and save for your next trip.