I put them all in a pillowcase that I didn't care for. I placed it in a trash can and filled it with hot water. I let it sit overnight.
I am storing my brown dye in ice cream buckets. (I got 4 buckets full of a deep drown dye). Since I don't currently have room in my freezer to keep them, they are going outside in the shed where they will stay cold, thankfully it is now cold outside.