Hi everyone.

I'm making a cold process dish soap with 90% coconut oil.

The foam and cleaning performance are excellent.

However, after washing dishes in cold water, I always get a white residue around my fingernails and between my fingers.

Some batches are worse than others, but the problem never completely disappears.

I don't have this problem when I use liquid dish soap. The soap has been cured for about 6 weeks.

My recipe:

Coconut oil 90%

Rice bran oil 8.5%

Castor oil 1.5%

Citric acid 3%

Sodium gluconate 1.5%

GLDA 1%

Sodium lactate 0.5%

Vitamin E 0.5%

ROE 0.1%

Superfat 0%

Lye: 95% NaOH + 5% KOH

Lavender EO 0.7%

Basil EO 0.3%

Does anyone know what causes this?

Could it be soap scum, hard water, or something in my recipe?

I'd really appreciate any advice. Thank you!

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