The greasy part may have to do a lot with the exact recipe aud superfat percentage.
Reading on the forum, many people complain that their soap is too cleansing or give them a squeaky clean feeling. Maybe that's exactly what you are looking for. Apparently increasing the percentage of coconut oil increases the cleansing factor.
Personally, I like the soaps to be slightly creamy. It's not the same as greasy, but rather a silky, moisturizing feeling.
Do you have any experience with a homemade soap which isn't "heavy" at all ?
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Residue can mean something else. In places with hard water, the calcium in water combines with the soap resulting in such residue (on the skin, but also bathtub, etc.), also called soap scum.
They said certain additives are required to fix that (EDTA).
Presummably i can get similar proporties as Olive with Sweet almond...?
You just said that you DON'T want similar properties as olive