use it as (sparingly) as possible- meaning a very thin (misting) across the batting, or fabric- what ever you are spraying- keep the spray as (contained) as possible. put together while tacky- allow to dry before sewing- it works best on fabrics that have been pre-washed (if they have not been washed you never know what (additives) are going to work) some fusables- and sprays do not work well at all on fabrics that still have sizing/starch in them---others work fine-
always best to test on a small area before spraying your whole project.
follow the instructions on the can for best results