I have read so many different recipes for bath bombs but what I wonder is what is the best proportion between dry substance( whatever you put:soda bicarb, citric acid, clay, epson salt, starch) and base oil+essential oil. I did a recipe if 3 parts dry stuff/ 1 part oil and a bit of essential oil, 10 drops if the above parts are table spoons and it was ok. Well I didn't wait for it to set properly before unmolding as I only had one shaper, so it crumbled a tiny bit while taking it out. But looking at the last recipe I am shocked at how dry it looks to me, does it hold together. Also would corn starch do the same thing as the tapioca for holding the aroma, as where I live I can't find tapioca?