1300 445 558
Video Guide

How to Use a Meth Test Kit

A simple DIY guide to screening hard surfaces for meth residue in homes, rentals, cars, boats, trucks and workplaces. Anyone can do it, and each kit gives a result in 5 minutes.

Published 12 March 2026 by Dan Neil, DAppSc (Applied Chemistry), MRACI CChem

What You'll Learn

Correct swab technique
Where to sample in houses & offices
Testing cars, boats and trucks
How to read your result in 5 minutes
Common mistakes to avoid

Video guide in production

The written steps below cover every stage.

This kit is a presumptive screen. It shows whether residue on the surface you swabbed is above or below the cut-off. A positive or unclear result needs laboratory testing. See professional meth testing.

How to Use the Kit in 7 Simple Steps

Each kit tests one surface. Follow these steps for every kit.

1 Get Ready

Bring the kit to room temperature. Open the foil pouch only when you are ready to test.

2 Wet the Swab

Dip the swab into the extraction bottle for 5 to 10 seconds so the tip is soaked.

3 Place the Template

Hold the sampling template flat against the surface. The opening marks a 10 × 10 cm square (100 cm²). You swab the surface inside the opening, not the template.

4 Swab the Square

Wipe the whole square with firm, even pressure, side to side and then top to bottom, twisting the swab as you go.

5 Mix

Put the swab back in the extraction bottle and mix for at least 1 minute. Squeeze the swab against the inside of the bottle several times, remove it, then cap the bottle, shake and wait 30 seconds.

6 Add Three Drops

Lay the cassette on a flat surface and add three drops from the tube to the sample well. Start your timer.

7 Read at 5 Minutes

Read the result at 5 minutes. Do not read it after 10 minutes. Write down the room and surface for each kit.

How to Read Your Result

  • Negative: two lines appear, C and T. Even a faint T line counts as negative.
  • Positive: only the C line appears.
  • Invalid: no C line appears. Repeat the test with a new kit.

A negative result applies only to the surface you swabbed. A positive or unclear result needs laboratory testing before any decision about the property.

Laboratory testing is available in every capital city: meth testing in Adelaide, meth testing in Brisbane, meth testing in Sydney, meth testing in Melbourne, meth testing in Perth, meth testing in Canberra, meth testing in Hobart and meth testing in Darwin.

Where to Test

Residue settles on hard surfaces near heat, ventilation and where people smoke. Use one kit for each area you want an answer for.

🏡

Kitchen

Rangehood, exhaust fan and splashback. Residue collects here, especially if meth was made in the kitchen.

🛀

Bathroom

Ceiling, exhaust fan cover. Ventilation systems trap airborne residue.

🛌

Bedrooms

Wall behind the bed and wardrobe surfaces.

🛒

Living Room

Wall at waist height, top of door frames. Airborne contamination settles here.

🚗

Vehicles

Dashboard, air vents, steering wheel and door trims. The same applies to caravans, motorhomes, boats, trucks and planes.

🏢

Workplaces

Air vents, bathroom exhaust fans, staff rooms and reception counters. Use one kit for each area you want an answer for.

Common Mistakes to Avoid

×

Don't clean surfaces before sampling. You want to detect what's there, not wipe it away. Cleaning gives false negatives.

×

Don't reuse a swab or extraction bottle. Use a new kit for every surface so results from different rooms don't mix.

×

Don't touch the swab tip. Skin oils and other residue can affect the result. Handle the swab by the stem only.

Frequently Asked Questions

One kit for each room or area you want an answer for. A typical house with two to four bedrooms uses about 10 kits: kitchen, bathroom, each bedroom, living area, hallway and laundry. The number of kits therefore follows the number of rooms and areas you want to check.
Test hard surfaces where smoke settles, such as the dashboard, air vents, steering wheel and door trims. Use one kit for each area you want a separate answer for. Do not clean the surfaces before testing, because cleaning removes the residue you are trying to find.
0.5 µg/100 cm² is the residential investigation level in the Australian Government's Clandestine Drug Laboratory Remediation Guidelines (2011). The kit shows whether residue on the surface you swabbed is above or below that level. It is not a line between safe and unsafe.
No. Cleaning removes the residue you are trying to find and can give a false negative. Swab the surface as you find it, without wiping or washing it first, so the result reflects the residue actually there. A false negative could suggest residue is absent when it is present.
About 5 minutes once you have swabbed the surface and added the drops. Read the result at 5 minutes and not after 10 minutes. Use one kit for each area you want an answer for, and allow about 5 minutes for each.
A positive or unclear screen needs laboratory testing before any decision about the property. A screening kit cannot measure how much residue is there or tell use from manufacture. Every assessment is scoped to the question being asked. Request a fee proposal and we will reply with the scope, fee and available dates.
DN

Dan Neil

Principal Occupational Hygienist and Chartered Chemist, Test Australia
DAppSc (Applied Chemistry) | MRACI CChem | AIOH member | Contamination assessment since 2001

Dan Neil is a Chartered Member of the Royal Australian Chemical Institute (MRACI CChem) and a member of the Australian Institute of Occupational Hygienists. He has worked in contamination assessment since 2001, across homes, workplaces and vehicles.

Related Services & Resources

Professional Meth Testing

Full on-site assessment by Test Australia — sampling, laboratory analysis, and detailed reporting for residential and commercial properties.

Our Testing Methodology

Learn about our sampling protocols, NIOSH 9111 method, chain of custody procedures, and quality assurance standards.

DIY Meth Test Kits

Packs of 3 to 100 with free express postage Australia-wide.

Related Articles

Meth Testing

What the 0.5 µg/100 cm² Level Means

What the Australian investigation level is and how results are read against it.
Meth Testing

The Complete Guide to Home Meth Testing

When a DIY screen helps, and when laboratory testing is the next step.
Meth Testing

Pre-Purchase Meth Testing: A Buyer’s Guide

What testing before you buy involves, and what the results can and cannot tell you.

Reviewed for Test Australia by Dan Neil, Principal Occupational Hygienist and Chartered Chemist (MRACI CChem). Dan has 25 years in industrial chemistry and forensic science experience and has been a member of the Australian Institute of Occupational Hygienists for more than 13 years. Last reviewed .

Ready to Test Your Property?

Order DIY meth test kits, or book a professional assessment with our Chartered Chemist.

Order Meth Test Kits Book Professional Assessment

Get Your Kits

Meth Test Kits: Packs of 3 to 100

Choose the pack size that suits your property or vehicle.

Disclaimer: This video and page are provided for general informational and educational purposes only and do not constitute professional advice. The content is based on the author's experience and knowledge at the time of production and may not reflect the most current regulations, guidelines, or scientific developments. The kit is a presumptive screening test and is not laboratory analysis. This information should not be relied upon as a substitute for professional contamination assessment, legal advice, medical advice, or other expert consultation. Individual circumstances vary and results depend on site-specific conditions. Test Australia Pty Ltd accepts no liability for any loss or damage arising from reliance on the information provided. For specific advice regarding your property or situation, please contact us directly for a professional assessment.