Hi, this is my first time posting but I feel I can actually contribute something!
My first batch of tooth soap was horrible:
Olive Oil 75%
Cocoa Butter 15%
Neem Oil 10%
I added added peppermint at 1 ppo because I wanted it to have a strong flavor, added 2 T xylitol and 2 t green clay for remineralizing.
Well, the neem made it so disgusting I almost threw up. The smell of neem doesn't bother me, but omg the taste mixed with peppermint was so gross.
Batch #2
I left out the neem completely, didn't even want to think about ever putting that stuff in my mouth ever again
Olive Oil 85%
Cocoa Butter 15%
I don't remember exactly how much xylitol or clay I added this time, but I think I cut the amounts in half, so ~1 T xylitol and ~1 t clay. I also used much less EO.
I divided the batch into thirds, added peppermint to one, sweet orange to another and left the last plain. For some reason the xylitol started separating from the soap and turned into a gloppy gellyish mass and stirring was just making it worse. I was soaping at room temp so it wasn't getting too hot or gelling. Just as an experiment I stuck the soap into the microwave for a few seconds and it melted the goo and totally incorporated back into the soap.
I only let them cure for about 3 days before trying (yeah, I'm impatient!). There was no soapy taste at all, but unfortunately not much of the EO came through either. It cleaned my teeth amazingly well. The only down side was that it makes the back of my mouth feel weird...you know how the back of your mouth waters really bad before you throw up? Well in that spot it almost feels acidic...really hard to describe. It doesn't bother me enough to stop using it and it goes away once I rinse. I hope this will diminish as the soap ages.
I did end up rebatching the peppermint to add more EO. I grated it, added a tiny splash of water and stuck it in the microwave. I mixed in more peppermint, probably 1 teaspoon (ish) and it's much better (even my 6 year old used it and liked it!). Going to rebatch the orange today and add in more orange and maybe some clove or cinnamon.
Overall I'm very happy with this recipe, I only made .25 lb and it's going to last forever!