Hi, I have previously read on this forum that clay can be used to help the soap ‘keep’ the lemon fragrance from lemon EO. I would like to try this as my lemon cold process soap doesn’t smell of lemon at all, I use 15%. Can anyone tell me how much clay I would need to use and if it would change the constituency of the soap a lot. If I could use it would I need to mix it with the EO first of all. Thank you