Yesterday I made a tiny batch of hp shaving soap from the recipe found in the big thread and I know it should cure for a couple of weeks or longer. Like a stupid I put it into the 2 tubs I had from old soap I bought. I used fragrance oil that I had laying around and it doesn't smell to strong. Can I put the lids on the tubs to keep the smell in while it cures or does it need to be open to the air. I don't want to lose the fragrance. Thanks!