Chili sauce oil leakage solution:

When the chili sauce cools down, put it in used canning jars (cleaned beforehand) or other glass jars, fill it up and then cover it tightly with a lid (if you don't have a lid, you can use a plastic paper or a handy bag to seal it on the mouth of the jar, and tie it tightly with a leather band or other string). This way you can eat it as you open it. As the glass bottle in which the chili sauce is stored is covered with a layer of spicy oil on top, this can protect the chili sauce from deterioration and can be stored for a long time.