I would just leave them in the mold until they are hard enough. Or stick it in the freezer for a couple hours and then unmold. If you post your full recipe including water/lye we can better help you. However, with 20% Castor it can make soap a bit sticky. You have 50% liquid oils so that too is playing into it. If you used full water and a higher superfat that too will affect it. 5-7% Castor is adequate. I do have one recipe I use 10% but never go above that.