My first couple batches of soap have been curing for three weeks and they are still a little soft. It feels like if you hit them with a meat tenderizer they would smush flat rather than dent. Strange visual but I don't quite know how to describe it. The 2mm thick edges I cut off and left to dry are quite pliable and I can almost bend them to 90 degrees, so I know its not just because the bars are thick. The recipe I used had 10% safflower oil. Should I try reducing this amount or do you think they will harden up with a few more weeks of curing?