Cosmetics Formulation Development

Dear team, I have tried making cream. น้ำมันมะพร้าว with the following ingredients: 1. Water 74% 2. น้ำมันมะพร้าว Extraction Cool 20 % 3. Soft Cream Maker™ 5% 4 . Mild Preserved Eco™ ( Preservative-Free ) 1 % Made it out and kept for about 2 weeks. The cream started to smell sour. I want to know what caused it or enter สารกันเสีย little or not correct Please advise, thank you.

Hello, disturbing members. Once mixed, prepare น้ำมันมะพร้าว that you Members choose to use them separately and put them together. under the same environment And try to see the changes as well. If both smell sour, it means น้ำมันมะพร้าว The type that members choose to use. There is a problem.