I have been using NG 100% soy for my melts and was just wondering if there is anything I could add to them just to make them a little harder. They come out of the molds just fine and don't crumble on me but they are really soft. I could switch wax but I get mine as needed from my mom who only uses NG soy for her candles and buys it by the case full. I am not in it to make money just save money because I love wax melts and I make them for a fraction of the cost of yankee. I love making them so I guess if I have to deal with soft tarts then I will cause they are just for me and some friends .