After the canned tomato sauce is opened, if it can not be eaten once, it will easily deteriorate after a period of time. So how can I keep the ketchup that has been opened for a longer time? Let me give you a few small ideas.
Method 1: Pre-treatment before eating, after boiling the ketchup, first steam in the pot and use a non-greasy spoon to take the sauce. In this way, the remaining ketchup can be stored for a long time.
Method 2: Put a layer of plastic wrap in the canned opening of the ketchup, and put it in the refrigerator for a long time. Scrape off the top layer when eating.
Method 3: salt + sesame oil. After each consumption, sprinkle some salt and drip some sesame oil into the tank, which can effectively inhibit the growth of bacteria in the tomato sauce and prolong the storage time.