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(NBC News) For some of us it just wouldn't be the holiday season without a live Christmas tree. But the tradition also brings a certain amount of danger.
Two trees, same size, same type...yet one goes up like a torch, while the other practically self extinguishes. The secret, the less flammable one was bought fresh and kept fresh using strategies from the Irvington Fire Department.
Gary Shumilch, Irvington, NJ Fire Department: "Take your hand, rub the stems of the tree, if the needles fall into your hand, that's a tree that you definitely do not want to buy. You pick it up and you bounce it and you see the needles start to fall off, that's the sign of a dried out tree."
After you get the tree home, it's time for the magic formula: water. Lot's of it.
Gary Shumilch: "You want to cut off at least two inches at the bottom, uh just before you put it into the tree stand and that's gonna allow it to suck up the water. The average six to eight foot tree will drink about a gallon of water every two days."
The difference between the flammability of a fresh, well-watered tree and one that has been allowed to dry out is truly striking. In a matter of seconds they can set a room ablaze.
Gary Shumilch: "These trees are fast, hot, and uh and treacherous."
And no matter how diligent you are about maintaining your tree...
Gary Shumilch: "Make sure your smoke detectors are working."
Indoor trees dry out for many reasons, mainly your home's heating system.
Also check your decorations to make sure your lights are certified by Underwriters Laboratories, meaning they're screened for safety.
Some people put their trees on timers to make sure the lights aren't left on too long.