How to use the water left over from washing gluten and leftover water with flour at home?

Wheat starch can be made by drying, as follows:

Ingredients: flour, water

Production steps:

1. Add water to the basin and start washing the gluten, as shown below for reference.

2. Wash the water should be very clear, the gluten will not become small, as shown in the picture below for reference.

3. Strain to avoid gluten particles, as shown below for reference.

4. Leave it for two to three hours to settle, as shown below for reference.

5. Pour off the water and take out the dry batter to dry in the sun, as shown in the picture below for reference.

6. It can be ground into wheat flour, as shown below for reference.