How to Make Soap Last Longer in the Shower

If you are new to making soap by the cold process method and wondered about making the soap last longer, check out this recent post from The Soap Queen called How to Make Soap Last Longer in the Shower.  I found it interesting that the Soap Queen says that cold process soap does not last as long as melt and pour.  To me I found it quite the opposite. What I would like to know is how to keep the fragrance or essential oil to last longer in a bar of cold process soap.   It always seems that the aroma is a lot stronger when I do a batch but by the time the batch is cured,,,there is hardly any scent.  Any suggestions out there?