What if the sweet potato powder is not dry and it rains?

Indoor drying, assisted by oven and hair dryer.

1. Indoor air drying: put part of the air-dried sweet potato powder into a well-ventilated indoor space with appropriate temperature for further air drying. Choose a cool but not humid place to ensure adequate air circulation.

2. Using oven: Using oven or electric oven, partially dried sweet potato powder can be heated in low temperature mode (about 40-50 degrees Celsius) in batches, and the fan is circulated to quickly remove water.

3. Assisted by a hair dryer: set the hair dryer to a low gear or a cold wind gear, and blow continuously at a proper distance from the sweet potato powder to help it quickly discharge some water.