I smoth the backing and lay the batting, folded in half on top. Spray batting and smooth over backing. Fold other half and spray, repeat smoothing. Spray half of batting again and place the top (folded in half) and smooth out. Spray other half of batting and repeat smoothing on other half pf quilt top. Then I turn the whole thing over and smooth out any wrinkles I have in the backing.
Pin sparingly and quilt from middle out.