How to produce instant starch for laundry?

To produce instant starch for laundry, mix 1 tablespoon of cornstarch with 2 cups of cold water in a spray bottle. Shake well to dissolve the starch, then spray it onto your clean, damp clothing before ironing. Alternatively, you can dissolve cornstarch in boiling water to create a thicker starch solution, which can also be used for a stronger finish. Allow the fabric to dry or iron immediately for best results.