you hear more about cancer each day.and with me applying granular fertilizer i am getting concerned... i read the lable and m.s.d.s. sheet and not much is said about the use of a respirator. 1.how many of you guys use one? 2. how much application do you do? 3. what brand do you use? i know my health is first and i do not wont to look like ghost-busters out there.