I had one soap I made that sweat quite a lot and continued to do so for quite a long time, in fact the few bars I still have from that batch still sweat. I am still unsure exactly what was the cause, as I have used the same formula many times without this sweating. At first I thought it was heat & humidity in my house, but it continued to sweat year round when neither heat nor humidity are an issue. I later discovered that this soap stops sweating once it is in use and allowed to dry normally between use. The other bars that still sit open to the air with other curing soaps remain unchanged.
It seems quite odd to me that only one batch using this recipe has ever done this, but at least the others have not, so it doesn't worry me any more like it used to. I have concluded that either it was an anomaly or possibly the added sugar I forgot to document the exact amount used in that particular batch.