Meth's harmful molecules can be re-emitted for months or even years, according to Glenn Morrison, an associate professor of environmental engineering at Missouri University of Science and Technology.

Ridding the home's interior of these harmful residues requires rinsing the walls, ceilings and floors with a special cleaning solution several times, according to Joe Mazzuca, co-founder of Meth Lab Cleanup. In addition, his company uses a "negative air" process that sucks out residue from hidden spaces.

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