“…Hotels and motels are increasingly used by meth-makers because the chemicals used – which can include lighter fuel, lye, lithium, and acetone, among other dangerous substances – seep into fabrics, furniture, and 
floors, according the Department of Justice website…”Â
“You basically destroy someone’s hotel room, and then you leave.”
At least 300 guests were evacuated from the Hampton Inn at 1301 Race St. about 5:30 a.m. as first Philadelphia firefighters, then the Police Department’s homeland security and terrorism unit arrived to handle the volatile chemicals left behind by a would-be meth-maker.
Investigators discovered in a third-floor room the chemicals and materials used in the “one-pot” or “shake-and-bake” method of producing the dangerous, highly addictive stimulant.
The procedure can result in toxic fumes and explosions, leave behind a dangerous trail of chemicals, and render the room uninhabitable.
For more: Â http://www.philly.com/philly/news/pennsylvania/20120729_Makeshift_meth_lab_forces_evacuation_of_Center_City_hotel.html
