Following the advice on this board, I use polypro bags. I believe if you are using regular ziplock bags from the grocery, those are polyethylene, which tend to "suck" the scent out. There is a lot of info in the archives about this subject, including where one can purchase polypro bags, as well as other containers to store tarts in. I get my bags from GTBag.com,(ultra clear) but I don't recall that they have gallon size. I believe a friend of mine gets hers from uline.com . Also, I make paraffin, not soy if that makes a difference. HTH!