How Residue from Meth Use Can Linger in Residential Spaces Across many Auckland suburbs, there’s growing concern about the invisible risks left behind by methamphetamine use in homes and rental properties. What might look like a well-maintained, move-in-ready space could still carry chemical residues that have been absorbed into carpets, walls, or ventilation systems. Unlike stains or mould, meth contamination isn’t something you can see—or clean—with surface-level fixes.