ID Cosmetology common mistakes
ID Cosmetology · Understand the traps and how to avoid them.
Treating disinfection as a quick wipe-down: using a spray-and-wipe on shears, clipper blades, or nail implements and returning them to service immediately, rather than cleaning first and then fully immersing in an EPA-registered hospital-grade disinfectant for the label's contact time.
Candidates memorize the word 'disinfectant' but not the two-step sequence (clean, then disinfect) or the contact time, and they assume a wet surface is a disinfected surface. Time pressure during practicals encourages shortcuts.
What to do instead
Build a fixed routine you can recite: clean with soap and water, dry, submerge in hospital-grade disinfectant for the full label time, rinse if required, store in a closed clean container. Practice saying the contact time out loud for the products you use so it becomes automatic under exam pressure.
Mixing up the levels of control: calling hand washing or a sanitizer a disinfectant, claiming a disinfectant sterilizes, or stating that implements touching blood must only be disinfected rather than handled as contaminated waste or sterilized where required.
The vocabulary (sanitize, disinfect, sterilize) sounds interchangeable in everyday speech, and candidates learn definitions in isolation without contrasting them side by side.
What to do instead
Make a three-row comparison chart: what it kills (bacteria only vs. bacteria and most fungi/viruses vs. all microorganisms including spores), typical products, and typical uses. Attach one concrete example to each row (hand soap, hospital-grade quat spray, autoclave) so the distinction is anchored to an object.
Confusing Idaho licensing and sanitation rule specifics with generic or neighboring-state rules: guessing the required hours, the renewal cycle, the continuing education requirement, or which violations trigger fines, instead of citing the actual Idaho statute or board rule.
Candidates study from general cosmetology textbooks that describe 'typical' state requirements, and Idaho-specific rules are a small slice of the material, so they get skimmed or skipped.
What to do instead
Study directly from the Idaho board's statutes and rules document, not a summary. For each rule, write a one-line card in the form 'number + unit + consequence' (for example, required training hours, license renewal period, CE hours, penalty range). Test yourself on the numbers, since that is where the exam separates Idaho-specific knowledge from generic knowledge.
Answering sanitation questions about foot spas, whirlpool basins, and pedicure equipment with the same answer as for hard implements, instead of applying the separate cleaning and disinfection schedule those units require after each client and at the end of the day.
Pedicure equipment rules are detailed and are usually taught briefly in a nail care unit, so candidates lump them with general implement care and lose the specific procedural steps.
What to do instead
Learn the pedicure equipment procedure as a numbered sequence (drain, clean with soap and water, disinfect with the correct concentration, flush the system, document). Write it from memory three times over a week and check each step against the rule text.
Misreading the exam's phrasing on haircutting and chemical services: choosing an answer that describes the general principle rather than the one that matches the stated hair type, density, growth pattern, or desired result, without checking whether the question asks for the 'best' or the 'first' step.
Candidates read quickly and pattern-match to a familiar keyword, missing qualifiers like 'most appropriate', 'initially', or 'except'. Scenario questions reward careful reading more than recall.
What to do instead
Practice underlining the qualifier and the client variable before looking at the options. For each option, ask 'does this fit this specific head of hair and this stated goal?' Eliminate answers that are true in general but wrong for the scenario.
Confusing color theory and developer strength in coloring questions: mixing the roles of the developer volumes, the difference between lifting and depositing, or the relationship between the natural level and the target level when formulating.
Color is taught visually and hands-on, so candidates learn to 'see' the result without building a numeric mental model, and exam questions test the numbers and the logic rather than the look.
What to do instead
Build a one-page reference: developer volumes and what each does, the level system, undertones at each level, and the rule for how much lift a given developer provides. Then work through formulation word problems where you must state the starting level, target level, and product choice with a one-sentence reason.
Answering anatomy and physiology questions with surface-level labels only: naming a muscle, bone, or nerve without knowing its function or location, or mixing up the layers of the skin and the structures within them.
Candidates memorize lists of terms for a quiz and never connect structure to function, so questions phrased as 'what does this do' or 'where does this sit relative to that' defeat them.
What to do instead
Study anatomy in functional pairs: structure plus action, and location relative to a landmark you can touch on your own body. Draw and label the skin layers and the main facial muscles from memory weekly, and explain each one aloud in one sentence.
Skipping the consultation step in scenario questions: jumping straight to a service recommendation without addressing the client's stated concerns, hair or skin history, prior chemical services, or the need to document and get agreement before proceeding.
Candidates treat consultation as soft material that is not really tested, and practical training often emphasizes technique over communication, so the analysis and documentation steps get ignored.
What to do instead
Reframe consultation as a checklist you can apply to any scenario: ask about history and prior services, assess the hair or skin, identify the goal, explain options and risks, confirm the plan, and document. Practice applying the checklist to written scenarios until it is the first thing you reach for.
Confusing salon business and Idaho law concepts: mixing up independent contractor versus employee status, booth rental obligations, record-keeping duties, or who is responsible for sanitation compliance in the salon.
These topics are abstract and are often taught last or self-studied, so candidates learn the terms without the practical consequences that exam questions probe.
What to do instead
Learn each business structure as a short 'who pays what, who controls what, who is liable for what' table. Tie each row to a concrete salon example (who withholds taxes, who sets prices, who is responsible for the disinfectant log) so the answer follows from the structure rather than from memory.
Guessing on safety and first-aid scenarios: responding to a cut, a chemical burn, or a client reaction with a generic 'stop the service' answer and no specific sequence, or failing to distinguish when to refer a client to a physician.
Candidates underestimate how often safety scenarios appear and have not rehearsed a sequence, so they pick the most cautious-sounding option rather than the correct order of actions.
What to do instead
Memorize a short universal sequence: stop the service, protect yourself with gloves, control the exposure, follow the product's safety directions, document, and refer when the situation exceeds your scope. Practice applying it to three or four written scenarios so the order, not just the instinct, is what you answer with.