Canine Nose work vs. Nosewerkx?

Post Detection Training and Attention to Detail: The Complete Guide to Cleaning, Decontamination, Storage, and Best Practices for Training Aids.  

By Nosewerkx LLC 

Introduction

A detection dog's nose is capable of identifying odor at concentrations far below what humans can perceive. This extraordinary sensitivity is what makes detection dogs so effective—but it also means that even microscopic amounts of unintended odor transfer can influence a training exercise.

Cross-contamination is one of the most common and preventable challenges in canine detection training. Whether training for explosives, firearms, narcotics, currency, electronics, conservation, or other target odors, improper handling and cleaning can lead to false alerts, inconsistent training results, and reduced confidence in a dog's odor recognition.

Maintaining odor integrity requires more than simply cleaning equipment. It involves disciplined handling procedures, proper storage, routine decontamination, and using training aids made from materials that are easy to clean and resistant to odor retention.

This guide outlines industry best practices for reducing cross-contamination while extending the life of reusable training equipment.

What Is Cross-Contamination?

Cross-contamination occurs when odor molecules are unintentionally transferred from one object, surface, or training aid to another.

Common examples include:

• Handling multiple target odors without changing gloves.
• Using the same forceps for different odors.
• Placing clean equipment on contaminated work surfaces.
• Storing different odors together.
• Reusing contaminated containers.
• Touching clean equipment after handling source material.

Because detection dogs recognize odor—not the container—any unintended odor transfer can affect the reliability of a training exercise.

Why Cross-Contamination Matters

Poor contamination control can result in:

• False alerts
• Poor discrimination between target odors
• Training inconsistencies
• Reduced confidence in certification exercises
• Difficulty troubleshooting performance issues
• Contaminated training environments
• Reduced lifespan of reusable training equipment

Maintaining clean, odor-controlled equipment allows handlers to better evaluate the dog's true detection abilities.

Common Sources of Contamination

The most common contamination sources include:

✓ Gloves

✓ Forceps and tweezers

✓ Aluminum scent tins

✓ Glass containers

✓ Plastic containers

✓ Storage cases

✓ Vehicle transport boxes

✓ Training bags

✓ Tables and work benches

✓ Clothing

✓ Hands

✓ Reward toys

✓ Hide containers

Best Practices Before Training

Proper preparation greatly reduces contamination.

Recommended practices include:

• Wear disposable nitrile gloves.
• Change gloves whenever switching target odors.
• Use dedicated forceps for each odor.
• Separate clean and contaminated work areas.
• Keep source material sealed until immediately before use.
• Limit handling time.
• Label all containers.
• Never mix target odors in storage.

Cleaning and Decontamination with 70% Isopropyl Alcohol (IPA) denatured

A 70% isopropyl alcohol (IPA) denatured solution is one of the most effective and widely used cleaning agents for non-porous canine detection training equipment. It helps remove oils and residues, evaporates quickly, and leaves minimal residue when used properly.

Compatible equipment includes:

• Anodized aluminum scent tins
• Stainless steel forceps
• Glass storage containers
• Metal training aids
• Compatible non-porous plastic components

Recommended Cleaning Procedure

1. Remove visible debris.
2. Apply 70% IPA denatured with a clean lint-free cloth.
3. Thoroughly wipe all exposed surfaces.
4. Pay special attention to seams, threads, and contact points.
5. Allow equipment to air dry completely.
6. Handle cleaned equipment using fresh nitrile gloves.

Although IPA is an excellent cleaner, no cleaning method can guarantee the complete removal of every odor molecule. Proper handling and storage remain equally important.

Dishwasher Cleaning for Glass and Larger Containment Devices

For larger containment devices and glass containers made from dishwasher-safe, non-porous materials, a dishwasher can be an efficient cleaning method.

Recommended Dishwasher Settings

• No dish soap or detergent
• No rinse aid
• Heated Dry OFF (Can degrade materials over time due to too direct heat)
• Standard wash or rinse cycle using clean, hot water
• Allow equipment to air dry completely before handling

Running a dishwasher without detergent helps avoid fragrances, surfactants, and residues that could introduce foreign odors. Turning the heated dry cycle off reduces unnecessary heat exposure and helps protect sensitive components.

Suitable items may include:

• Glass jars
• Glass containment vessels
• Stainless steel containers
• Dishwasher-safe anodized aluminum training aids
• Durable non-porous containment devices

Always verify that the equipment is dishwasher-safe before cleaning.

UV-C Light 

Some trainers supplement routine cleaning with UV-C light Ovens.

UV-C (approximately 254 nm) is commonly used to disinfect hard surfaces.

Benefits include:

• Chemical-free sanitation
• Additional surface hygiene
• No moisture introduced

Limitations include:

• Only disinfects surfaces directly exposed to the light
• Cannot clean beneath debris or inside hidden crevices
• Does not replace physical cleaning
• Extended exposure may degrade some plastics and rubber

Controlled Heat

Controlled heat may assist in decontaminating compatible non-porous equipment.

Suitable materials may include:

• Glass
• Stainless steel
• Aluminum

Avoid heating:

• Foam
• Rubber seals
• Electronics
• Adhesives
• Plastics not rated for elevated temperatures

Heat should always be considered a supplemental cleaning method rather than a substitute for proper contamination control.

Why Glass Is the Gold Standard for Long-Term Odor Storage

Glass has long been considered the preferred material for storing source odors because it is non-permeable.

Unlike many plastics, glass does not absorb odor molecules.

Advantages include:

• Non-permeable
• Chemically inert
• Easy to clean
• Easy to decontaminate
• Preserves odor purity
• Excellent for long-term storage
• Reduces residual odor retention

Whenever practical, source odors should remain stored in airtight glass containers and transferred into training aids only when preparing for training.

Storage Best Practices

Proper storage is just as important as proper cleaning.

Best practices include:

✓ Store source odors in airtight glass containers.

✓ Label every container.

✓ Store each target odor separately.

✓ Keep clean equipment separate from contaminated equipment.

✓ Use dedicated transport containers.

✓ Store in a cool, dry location.

✓ Keep lids closed whenever possible.

✓ Inspect containers regularly.

✓ Replace damaged equipment immediately.

Common Mistakes

Avoid these common errors:

• Wearing the same gloves throughout training
• Mixing different odors
• Using scented household cleaners
• Storing clean equipment with contaminated equipment
• Touching clean tools after handling source material
• Failing to clean transport cases
• Assuming equipment is clean simply because it looks clean

A Layered Approach to Contamination Control

The most successful detection programs combine multiple best practices.

A proven workflow includes:

1. Store source odors in airtight glass containers.
2. Wear fresh nitrile gloves.
3. Use dedicated forceps for each odor.
4. Transfer odor immediately before training.
5. Clean equipment with 70% IPA after use.
6. Use a detergent-free dishwasher cycle for compatible larger containment devices and glassware when appropriate.
7. Supplement with UV-C or controlled heat where compatible and appropriate.
8. Allow all equipment to air dry completely.
9. Store clean equipment separately from source odors.

No single cleaning method can eliminate every trace of odor. A disciplined, layered process provides the greatest protection against cross-contamination.

Why Material Selection Matters

Not all training equipment is created equal.

Porous materials may absorb odor molecules, making them difficult to fully clean. Non-porous materials are generally easier to decontaminate and better suited for reusable detection training equipment.

Selecting durable, reusable equipment made from appropriate materials helps maintain training consistency while reducing long-term replacement costs.

Nosewerkx Training Products

At Nosewerkx LLC, every product is designed with durability, repeatability, and contamination control in mind.

Our reusable detection training products are manufactured using high-quality, non-porous materials selected for their ability to withstand routine cleaning and decontamination. Depending on the specific product and material, they are compatible with many of the cleaning methods discussed in this article, including:

• Cleaning with 70% isopropyl alcohol (IPA)
• Washing compatible components using hot water
• Cleaning compatible glass components in a dishwasher (without detergent and with the heated dry cycle turned off)
• UV-C sanitation where appropriate
• Controlled heat methods for compatible materials

Our products are engineered for repeated use in a wide variety of environments, including:

• Indoor training facilities
• Outdoor training environments
• Law enforcement training
• Military applications
• Search and rescue
• Conservation detection
• Detection certification exercises

Rather than relying on disposable equipment, Nosewerkx products are designed to provide long service life when maintained using proper cleaning, handling, and storage practices. This allows trainers to spend less time replacing equipment and more time focusing on effective, consistent odor presentation.

Frequently Asked Questions

Does alcohol completely remove target odor?

No. While 70% IPA is an effective cleaner for many non-porous surfaces, no single cleaning method can guarantee complete removal of all odor molecules.

Why should source odors be stored in glass?

Glass is non-permeable, chemically inert, easy to clean, and does not absorb odor molecules, making it the preferred material for long-term odor storage.

Can I wash training aids in a dishwasher?

Yes, if the equipment is dishwasher-safe. Use no detergent, no rinse aid, and turn the heated dry cycle off. Allow equipment to air dry completely before handling.

Can UV-C light replace cleaning?

No. UV-C is a supplemental sanitation method and should be used only after physical cleaning.

Why should gloves be changed so often?

Changing gloves when switching odors is one of the simplest and most effective ways to prevent cross-contamination.  Additionally, use a new set of gloves when handling your distractors and/or proofs in-conjunction with target odor containments.  

Final Thoughts

Successful canine detection training depends on consistency, discipline, and attention to detail. Every step—from handling source odors to cleaning equipment and storing training aids—plays a role in preserving odor integrity and reducing the risk of cross-contamination.

By combining proper handling procedures, routine cleaning with appropriate methods, thoughtful storage practices, and durable reusable equipment made from non-porous materials, trainers can create more reliable training scenarios that better reflect real-world operational conditions.

At Nosewerkx LLC, we believe the best training begins with equipment designed for repeatable performance, easy maintenance, and long-term reliability. When paired with sound contamination control practices, reusable training aids can help handlers deliver consistent,  high-quality odor presentations—whether training indoors, outdoors, or preparing for certification.