1, if you need to save the ketchup has been done, you can first put the ketchup into the processed glass bottle, the top is also to leave a gap of about 1cm. Then the glass bottle together with the cap into the steamer, the cap should be false cover on the mouth of the bottle, steam 20 minutes on high heat, add a small amount of high white wine or lemon juice in the bottle, quickly tighten the cap can be, in order to prevent scalding can be wrapped in one hand a piece of wet towel.

2, used to preserve the ketchup glass bottle must be sterilized, and to ensure that no grease and raw water present.

3, must be in the ketchup is still very hot when you screw the lid, add a high degree of white wine or lemon juice is to be more insurance, do not like can not add.

4, the cap must be able to completely seal, if you can not guarantee a complete seal, you can cover 1 to 2 layers of plastic wrap and then tighten the cap, or simply use wax sealing is more secure.

5. After opening, the ketchup must be stored in the refrigerator and consumed within 1 month.

6. Try to scrape off the top layer of ketchup after opening it and throw it away, so that it will be safer to eat.