The spray sunscreens have come under fire recently. Experts say you could be inhaling harmful chemicals if you are using spray sunscreen. Consumer Reports suggests parents not use them on kids, pending an investigation from the Food and Drug Administration.octors say chemicals like titanium dioxide and zinc are fine in sunscreen lotions, but dangerous in a spray can. Doctors say even though a lotion sunscreen takes longer to apply, they recommend you use that instead because it is safer and lasts longer.