i made some beautiful pink grapefruit swirl soap a few weeks ago. i used pink grapefruit eo and they smelled GREAT! now, a few weeks down the road, they barely have any scent at all! i recall hearing that citrus does fade, but is there anything i can do to keep it around? it smelled so great before......would dumping in more help, or should i be adding something else to give it staying power????