I use Sta-Flo starch, you can get it in 1/2 gallons at Walmart. Bring it home and pour into a gallon container and fill with water. Dampen your fabric with water then spray solid with the starch. I like to put mine in the frig over night or all then iron until DRY ! ! ! All of this is before you cut any pieces. You will have less dust (fuzz), less raveling, better matched seams , etc., etc. A much better quilt top, that is my opinion. You cannot do this after pieces are cut because the starch will disstort the pieces.
After being 'scared straight' by this forum I recently washed and ironed all my batiks, and then bought liquid starch to use on other fabrics. I just couldn't remember how to use it... Your way sounds great, but doesn't the starch clog the bottle/nozzle when it dries?