Meth cooks are moving out of homes and into campervans, according to police.
Documents obtained by Newshub show police are finding fewer clandestine laboratories in houses - but they are detecting them elsewhere.
"They are more likely to be mobile, and in industrial and more remote areas," the briefing says.
Labour's Stuart Nash thinks meth cooks may have got some inspiration from a hit TV show.
"They got smarter, they've obviously been watching Breaking Bad," he said.
Breaking Bad is a series based around a chemistry teacher suffering from cancer. To pay for his treatment, he sets up a meth lab in a mobile home.
The briefing does say one type of house is still being used widely - holiday homes.
"They've got smarter, they understand, you know - 'We want to get away with this now, we go to holiday homes or we have a mobile lab' - which is a lot harder to detect," Mr Nash said.
But while police are detecting fewer clan labs, the briefing states those they do find "tend to be capable of producing greater amounts of methamphetamine than previously".
To combat that, Mr Nash wants to put more funding into community police, who would be more connected.
"Police have always got to be one step ahead of this. If they haven't refreshed the meth plan, if they're not resourcing it in a way that would allow them to get ahead of these crooks, then they're never going to beat them," he said.
In the Police Key Messaging briefing prepared for senior police management and the Minister for Police in December, police admitted that although they are seizing record amounts of methamphetamine there's been "no visible impact on the availability".
It makes the admission that the price of methamphetamine is falling - indicating the market has adapted to the seizures and "remains well supplied and demand is high".
Police say they take a holistic approach to reduce the harm meth causes, including cracking down on importation, production, supply and demand.
"Opportunities to reduce the impact of methamphetamine on our communities require multi-agency initiatives focused on enforcement, prevention, treatment, and harm reduction," Detective Superintendent Greg Williams said.
"The approach in regards to disrupting the supply chain is hinged on the strong networks we have built with our partners across Government including NZ Customs Service, Ministry of Health, Immigration and the Ministry of Justice. We have also built strong partnerships internationally."
Newshub.
