Rather than buying spray starch, especially if you rarely need to use it with your laundry, try this super simple recipe to make your own.
1 tbsp cornstarch
1 pint cold water
Combine and stir well until cornstarch is completely dissolved. Add to spray bottle. Be sure to shake well before each use to ensure the cornstarch solution is completely mixed and hasn’t settled, especially if you do not use spray starch for your laundry on a regular basis.