Instruments in the nail salon: the difference between cleaning, disinfection, and sterilization explained simply
Cleaning, disinfection, and sterilization are three distinct stages in the reprocessing of reusable instruments. Each has a clear purpose and a different level of microbiological efficiency. If you confuse them or skip one of them, you compromise the safety of the entire workflow.
In a nail salon, instruments come into direct contact with the skin, cuticles, and sometimes blood. The same principle applies in clinics, dental offices, or veterinary practices: what looks clean to the naked eye may remain contaminated at a microscopic level.
Keep three basic ideas in mind:
- cleaning removes visible dirt and reduces the microbial load;
- disinfection destroys most pathogenic microorganisms, depending on the product's level;
- sterilization eliminates all forms of microbial life, including bacterial spores.
If you want a safe protocol that complies with health standards, apply these stages in the correct order and use products authorized for professional use.
Why does correct reprocessing of manicure instruments matter?
Manicure instruments – nippers, scissors, curettes, bits – can cause micro-lesions. Through these breaks in the skin, bacteria, fungi, and viruses can pass from one client to another.
According to Ministry of Health Order 1648/2024, which establishes mandatory hygiene, disinfection, and sterilization procedures in salons, every salon must follow a clear instrument reprocessing flow and use exclusively biocidal products authorized by the National Commission for Biocidal Products. Staff must be trained and certified in professional hygiene according to Ministry of Health Order 2209/2022.
Health authorities require:
- the existence of a clear dirty-to-clean workflow;
- the use of authorized biocidal products;
- compliance with concentrations and contact times;
- documentation of sterilization cycles;
- entry in the cleaning, disinfection, and sterilization register: date, product used, concentration, contact time, and the name of the person responsible.
For more relevant details, read this hygiene and disinfection guide for beauty salons!
Cleaning manicure instruments: the foundation of any protocol
What cleaning means
Cleaning refers to the mechanical removal of dirt: gel residue, filing dust, skin, dried blood. You use water and professional detergent, applied manually or in an ultrasonic bath.
The detergent works by solubilizing fats and loosening organic residues. Without this stage, the disinfectant cannot come into direct contact with the microorganisms.
Why you cannot skip cleaning
Organic matter forms a barrier. Disinfectants based on alcohol or quaternary ammonium compounds lose their effectiveness in the presence of proteins and blood. Even if you respect the contact time, the result remains insufficient. Cleaning is mandatory and cannot be substituted by disinfection; this is a fundamental rule established by both national legislation and best practices in the beauty industry.
In most cases, disinfection failure stems from superficial cleaning.
How to properly clean instruments
Apply a clear protocol:
- Collect instruments immediately after use in a tray dedicated to the dirty area.
- Wash them with water and professional detergent. For stable results, brush the joints and serrated areas.
- Use the ultrasonic bath for instruments with hard-to-reach areas.
- Rinse well and dry completely before disinfection.
Do not leave instruments wet in closed containers. Humidity promotes corrosion and the growth of microorganisms. Replace rusted or damaged instruments immediately; affected surfaces retain residue and prevent effective processing.
Disinfection of manicure instruments: controlled risk reduction
What is disinfection
Disinfection is a chemical process by which you destroy most vegetative bacteria, fungi, and viruses. The level of efficiency depends on the product and the European standards it meets.
According to SR EN 14885:2022, the following standards apply to reusable instruments in salons:
- EN 13727, EN 14561 — bactericidal activity
- EN 13624, EN 14562 — fungicidal activity
- EN 14348, EN 14563 — mycobactericidal activity
- EN 14476 — virucidal activity
High-level disinfection may have partial sporicidal action but does not replace sterilization for critical instruments.
The level of disinfection is chosen based on the type of instrument:
- Work surfaces (sink, work bed, benches) — low level, after each client.
- Nail files, tweezers, basins, brushes, sinks — medium level, after each client.
- Items that come into contact with mucous membranes or broken skin (scissors, nippers) — high level, after each use.
- Any surface splashed with blood or body fluids — medium or high level, immediately after contamination.
How to choose the right product
Choose only products from the disinfectants for instruments and equipment category, with a clearly specified spectrum of action and authorization for cosmetic or medical use. Containers used outside the original packaging must be clearly labeled with: product name, batch number, concentration, and preparation date.
For instruments, you can use a ready-to-use product, such as Sterisol® high-level RTU disinfectant, formulated for immersion and compatible with use in an ultrasonic bath. Respect the contact time indicated on the label and do not shorten the duration, even if you are on a busy schedule.
If you use a concentrated product, such as Deziamino, prepare the solution at the correct concentration (e.g., 1%, according to the technical data sheet). Measure carefully and replace the solution according to the manufacturer's instructions.
The limitations of ethyl alcohol
70% ethyl alcohol has rapid action on bacteria and lipid-enveloped viruses, but it evaporates quickly and does not act effectively in the presence of organic matter.
Do not use alcohol as the sole method for instruments that may cause bleeding.
Common mistakes in disinfection
- Incorrectly diluting the concentrated product.
- Reducing the contact time.
- Keeping instruments permanently in the same solution.
- Not rinsing and drying the instruments after immersion, even though the label requires it.
- Mixing different types of disinfectants — forbidden.
- Using electrical equipment that cannot be immersed instead of wiping and spraying with a biocidal product.
Sterilization: complete elimination of microorganisms from manicure instruments
Definition and principle
Sterilization destroys all forms of microbial life, including bacterial spores. This is the mandatory stage for instruments that can cause lesions or come into contact with blood.
According to the hygiene and disinfection guide for beauty salons, reusable sharp or pointed items (curettes, razors, scalpels, bits, microblading holders) strictly require sterilization using physical or physical-chemical methods.
The autoclave – the standard in the professional environment
The autoclave uses pressurized steam:
- 121°C for 15–20 minutes, or
- 134°C for 3–5 minutes, depending on the program.
Saturated steam coagulates microbial proteins and destroys even spores. In salons, clinics, and offices, the autoclave is the recommended method for reusable metal instruments. Use exclusively authorized (CE) devices and respect the manufacturer's technical parameters.
Other methods and their limitations
The dry heat sterilizer operates at 160–180°C for 60–120 minutes. The process takes longer, and not all materials withstand these temperatures.
The UV sterilizer does not ensure complete sterilization. Radiation acts only on directly exposed surfaces and does not penetrate joints or shadowed areas. Use it for storing already sterilized instruments, not as a primary method.
Efficiency control
Verify each cycle through:
- chemical indicators on sterilization bags;
- internal indicators placed inside the package;
- periodic biological tests.
Note the date, cycle parameters, and responsible operator. Sterilization packaging must be inscribed with the date and the person responsible for sterilization. Sterilized instruments must be stored in a closed, dry, clean space with controlled access and minimal handling.
Comparative table: Cleaning vs. Disinfection vs. Sterilization
| Procedure | What it removes | When to apply it | Is it sufficient for high-risk instruments? |
|---|---|---|---|
| Cleaning | Visible dirt, reduces microbial flora | First step, after each use | No |
| Disinfection | Most bacteria, fungi, viruses | After cleaning, before sterilization | No |
| Sterilization | All microorganisms, including spores | Last step for reusable instruments | Yes |
Respect the order of the stages. If you skip cleaning or sterilization, you compromise the final result.
Complete procedure in the salon: correctly organized workflow
Organize the space into two distinct areas: dirty and clean. Do not mix them.
Recommended flow:
- Collect used instruments.
- Clean and rinse.
- Check the integrity and working condition of the instruments.
- Disinfect by immersion, at the correct concentration.
- Rinse (if the label requires it) and dry.
- Package in sterilization bags.
- Run the cycle in the autoclave.
- Store in a dedicated cupboard, in sealed packaging.
General cleaning of the salon is carried out at the beginning and end of the program, as well as whenever necessary, by designated staff.
Replace rusted or damaged instruments immediately. Affected surfaces retain residue and prevent effective processing.
Personal and client hygiene: part of the protocol
A complete hygiene protocol in the salon is not limited to instruments. Staff hygiene is just as important:
- The uniform is changed daily.
- Hand hygiene is mandatory before and after each client, after accidental contamination with blood or body fluids, and after removing gloves.
- Washing is done with antibacterial soap and running water; drying with disposable paper towels. Reusable textile towels are prohibited.
- Hand sanitizer must be available at the entrance and at the workstation.
- Gloves are recommended for nail services, waxing, or invasive cosmetic procedures.
- Nails must be cut short; wearing rings, bracelets, or watches during procedures is prohibited.
- The operator cannot perform procedures if they have lesions or irritation on their hands.
For the client:
- Clean or disposable towels for each client.
- Hand sanitizer available at the entrance.
- Informing clients about the hygiene measures applied in the salon.
Sterilization at home: what is realistic
If you use instruments only for yourself, keep a personal set and do not lend it out. Clean and disinfect after each use with professional products.
Boiling reduces the microbial load but does not destroy all bacterial spores. It is not equivalent to sterilization in an autoclave.
Abrasive files and buffers are single-use. Do not attempt to sterilize them. Replace them after each use or keep them strictly for personal use.
Apply a correct protocol and protect your business
Cleaning, disinfection, and sterilization have different purposes and are not mutually substitutable. Respect the order of the stages, use authorized products, and check your equipment periodically.
Analyze the current workflow in your salon or office and adjust it where necessary. Choose professional solutions adapted to the type of instruments and the volume of work for a safe and compliant process.
