. >> reporter: grelner has seen the worst. here a fire trapped a meth maker's daughter inside.guy broke a window and pulled her out. >> he's no hero in my book. he's a guy that got very, very lucky he didn't kill his child that day. >> reporter: grelner himself has paid a price. >> this is the actual one pot bottle. this is the most dangerous part. >> reporter: lung damage from chemicals at a meth lab. >> i carry inhalers around with me now. i take two or three different medications a day. i end up hospitalized one or two times a year. >> reporter: it hasn't stopped him from leading a battle to turn off the faucet for maeth labs. the key ingredient for making meth, pseudoe fed rin, can be extracted from some decongestants and then chemically altered. >> if we remove one oxygen atom within, rereduce that pseudoso fed rin hydrochloride by one oxygen atom, we go from this to this. >> reporter: sue do e fed rin used to require a doctor's prescription. but in 1976, the fda allowed it over the counter. today, all you have to do is show the pharmacist an id, and there's a limit on how