First, read the English article below.

Mix one cup (237 g) of vinegar and two cups (474 g) of baking soda. Pour the solution into a garbage bag or container large enough to fit the grates. Place the grates in the solution and allow them to soak overnight. Place a cover on the container. If you use a garbage bag, fasten it with a rubber band. Untie the rubber band or remove the cover from the container. Lift the grates out of the solution. Then, rinse them down with a garden hose. Most of the stuck-on food should fall off. Use a nylon brush for porcelain-coated grates. Move in gentle diagonal strokes. Cast iron or stainless steel grates can handle stainless steel bristles. Move in a gentle vertical direction. Hose the grates down one last time. Pat the surface dry with a microfiber towel. Then, replace the grill. 

Now, please write a short abstract for it in Vietnamese. Abstract:
Ngâm vỉ nướng trong dung dịch giấm. Lấy vỉ nướng ra khỏi dung dịch và rửa sạch. Kỳ cọ sạch các cặn bẩn còn sót, nếu cần thiết. Rửa sạch và lau khô vỉ nướng.