Im not worried. Soak in vodka every night if your that paranoid. Im more worried about dust mites, I heard the average mattress doubles in weight over 10 years, and thats not because it grew new springs.... thats ALOT of dust mites, just think, theyre crawling by the millions into every orifice of your body as you sleep, setting up their own countries on your scalp, taking poops on your eyeballs, being inhaled by the thousands into your lungs everytime you breath.... you cant stop them, theyre coming for you, heck, they've already got you dominated, theyre everywhere, theyre on you, inside you, around you, and ...... and pooing on you (cause certainly dust mites have to go potty right??? Id assume so!).