Carrelcrème breaks by adding zinc oxide. ZnO 10% chloramine 80mg Cholesterol 1.8 g liquid paraffin oil 6g White Vaseline 52g Aqua AD 100g

In advance, I would like to note that cholesterol has a high melting point and that long-term heat should be heated on the boiling water bath to completely melt the cholesterol and mix homogeneous with the fat phase. I suspect that your third method gave a good result? For improvement you could add to the fat phase 0.5 g oleic acid. After reaction with ZnO, Znoleate develops that ZnO will moisten and improve contact with a lipophilic medium.