Using this airtight glass storage jar is super easy. First, simply open the lid and put your dry goods like cereals, nuts, or coffee beans into the jar. Then, close the lid tightly to create an air - tight seal. This will keep your food fresh for a long time. When it comes to cleaning, you can wash the jar with warm soapy water and a soft sponge. Make sure to dry it thoroughly before using it again. As for the lid, clean it gently to maintain its air - tight function. One important thing to note is that don't use the jar to store hot liquids or put it in the microwave as the glass might break. Also, avoid dropping the jar to prevent it from cracking. With proper use and care, this storage jar will serve you well for a long time.