Once the ingredients are well-combined, they'll start to form a lump that sticks to your spoon. When your clay ball forms, turn off the heat and move the pot to a cool burner. Be careful with the clay and the pot, as they are both hot. Don't burn yourself! Use your wooden spoon to remove the clay ball from the pot. Place the clay ball on a sheet of wax paper so it can cool for about 2 minutes. Then, use your fingertip to see if the ball feels warm to the touch but not hot. Handle the clay when it feels about room temperature. The clay will be hot when you first take it out of the pot. Don't touch it because it will likely burn your hand. When you're not using your clay, keep it in an airtight container so it won't dry out. If you store it correctly, your clay should last for several months. You can also store your clay in an airtight food storage container. If you want to use your clay to create a figurine, keepsake, or project, you can preserve your work by letting it air dry for about 2 days. Leave the clay untouched during this time, then check on it. If it still feels a little moist, it may need more drying time.

How would you rephrase that briefly using Vietnamese?
Dừng khuấy và tắt bếp khi đất sét trở thành khối đặc. Đặt đất sét lên giấy nến khoảng 1-2 phút để đất sét giảm nhiệt. Bảo quản đất sét trong túi nhựa có khóa kéo đến 3 tháng. Hong khô đất sét nếu bạn muốn tạo mô hình điêu khắc hoặc đồ lưu niệm.