I've been basically using the BC instructions (diffrent kinds of salts tho) and after sitting a month or two, the salts get mushy. I quit using liquid colorants so that wasn't it. I tried different carrier oils. What is the deal? here's the recipe--Should I leave the oil out or would they be drying then? the recipe total 2 lbs salts (dead sea salt, sea salt, epsom salts) 3 oz Dendritic Salts 3/8 oz Fragrance or EO (.375 oz on digital scale) (about 3/4 tbsp) 1 oz (2 tbsp) Glycerine or Carrier Oil for moisture, such as soybean, grapeseed, sweet almond, etc. Or you can use Cyclomethicone to add a silky feel, and it leaves no oily residue in the tub!