When chillies remain moist, moulds develop and the chillies will go bad. Some moulds produce a poison, called aflatoxin, which is toxic to people. To speed up drying and to dry your food hygienically you can use a solar dryer that uses the heat of the sun to dry fruits and vegetables. Solar dryers come in many shapes and sizes, but the principles stay the same. In this video, we will learn how to make and use a simple solar dryer to dry chillies.