if it got thick again, it was not thin like it will be when it is done. sounds like you are working up to it. by thin, its not oil thin, it is watery thin. you will not be able to feel much viscosity at all. it will be watery-like. and it wont get thick again if you work it hard. you are definitely getting there.if it is all done, it will not seperate if you spit it into a cup and let it sit. but with coconut oil, this may be harder to determine because it solidifies at room temp. you will know when it has reached saturation.