First, read the English article below.

The mixture will be too runny to use at first. In order to get a gooey texture, chill your mixture in the fridge. While it only takes two to three hours for the mixture to thicken, it's best to leave it in overnight. This gives the xanthan gum time to dissolve completely. 

Now, please write a short abstract for it in Vietnamese. Abstract:
Làm lạnh hỗn hợp qua đêm.