I spray about 85% Sta Flo to 15% water. It did get on my laminate floor which I had to scrub off. It did not sweep or vacuum away. Now, when I spray starch large pieces of fabric, I place a bed sheet under my ironing board. Problem solved! By the way, I've never had a problem with Mary Ellen's Best Press or spray starch in cans; but I don't use them as much as Sta-Flo.