OH Esthetician common mistakes
OH Esthetician · Understand the traps and how to avoid them.
Using the terms disinfection, sanitization, and sterilization interchangeably when answering questions about implement handling, and stating that a hospital-grade disinfectant 'sterilizes' tools.
Everyday salon talk blurs the three levels, and candidates memorize the disinfectant product label without learning the definitions of each level of microbial kill. The exam tests the distinction directly.
What to do instead
Build a three-row table: sanitization (reduces soil and some microbes on surfaces), disinfection (kills most pathogens on nonporous implements, EPA-registered hospital-grade tuberculocidal), sterilization (destroys all microbial life, autoclave). Practice labeling 20 salon items into the correct category until the mapping is automatic.
Describing the required cleaning sequence for reusable implements in the wrong order, for example disinfecting before scrubbing off product residue or skipping the intermediate rinse and dry step.
Candidates recall the disinfectant contact time but forget that organic residue inactivates the disinfectant, so the scrub-and-rinse step is what makes disinfection work.
What to do instead
Memorize the chain as: wear gloves, scrape and scrub with detergent and water, rinse, dry completely, fully immerse in hospital-grade disinfectant for the label contact time, remove with clean tongs, rinse, dry, store covered. Recite the chain aloud before bed for a week and write it from memory on scratch paper at the start of the exam.
Answering hand-washing and glove questions by saying gloves replace hand washing, or describing a quick rinse as sufficient between clients.
Gloves feel protective, so candidates assume they substitute for hygiene. The exam repeatedly tests that gloves are an addition, not a replacement, and that hands must be washed before gloving and after removal.
What to do instead
Anchor the rule to a single sentence: gloves protect the esthetician and client only when hands are clean before and after. List five moments hands must be washed (on arrival, before service, after contact with body fluids, after restroom, after removing gloves) and rehearse them until they are automatic.
Confusing the layers of the skin and the functions of the dermis and epidermis, for example stating that the dermis contains keratinocytes that produce melanin or that the stratum corneum is living tissue.
Diagrams and simplified textbook summaries make the layers look interchangeable, and candidates memorize the names in order without attaching a function to each layer.
What to do instead
For each layer, write one sentence on what it does and one cell type that lives there: stratum corneum (dead keratinized cells, barrier), stratum granulosum (keratohyalin, water barrier), stratum spinosum (desmosomes), stratum basale (mitosis, melanocytes), dermis (collagen, elastin, fibroblasts, blood vessels, nerves), hypodermis (fat, insulation). Test yourself by naming the layer that performs a stated function, not just by reciting the order.
Misidentifying skin types and conditions during analysis questions, such as calling a dehydrated oily skin 'dry' or labeling a pustular breakout as a simple comedo.
Candidates use the words dry and dehydrated interchangeably and rely on surface shine alone rather than on a structured analysis of pores, texture, oil distribution, and hydration. Conditions such as acne, rosacea, and hyperpigmentation then get lumped together.
What to do instead
Practice a written analysis protocol: assess oiliness by pore visibility and shine after cleansing, hydration by fine lines and tightness, sensitivity by erythema and reactivity, and pigmentation by distribution. For each condition, list the visible signs and the contraindicated treatment (for example, no extractions or heat on active rosacea). Drill with 15 written case descriptions until your diagnosis and contraindication match.
Skipping or rushing the client consultation and intake form, and failing to document contraindications, medications, or patch test results before a service.
Candidates treat consultation as paperwork to get through and underestimate how often the exam tests informed consent, medical history, and record-keeping as legal and safety requirements.
What to do instead
Memorize the intake elements as a checklist: medical history, medications including isotretinoin and blood thinners, allergies, pregnancy, recent peels or waxing, skin conditions, and prior reactions. Practice writing a consultation note that records the service performed, products used, patch test outcome, and any adverse response, with the client signature and date.
Treating waxing and hair removal as one technique, using the same temperature and application for the face, bikini, and legs, and waxing over a client who recently used retinoids or isotretinoin.
Candidates learn the mechanics of a single wax strip and generalize it, forgetting that hair growth cycle, skin sensitivity, and medication history change the appropriate method and temperature.
What to do instead
Build a comparison sheet for soft wax, hard wax, sugaring, and threading: hair length needed, ideal body area, temperature range, and contraindications. Add a hard-stop list (isotretinoin, recent chemical peel, active infection, sunburn, certain prescription retinoids) that means no service, and rehearse how to explain the refusal to a client.
Applying makeup and skincare product knowledge by brand and marketing claim rather than by ingredient function, for example recommending an exfoliant without knowing its pH or active concentration.
Candidates study product lines instead of chemistry, so they cannot answer questions about humectants, emollients, occlusives, surfactants, or acids, and they misjudge which products can be layered together.
What to do instead
Create an ingredient card for each of the following: humectants (glycerin, hyaluronic acid), emollients (fatty alcohols, oils), occlusives (petrolatum, dimethicone), surfactants (cleansers), alpha and beta hydroxy acids, retinoids, and vitamin C. For each, write its function, typical concentration, and incompatibility. Then answer 10 questions about which two ingredients should not be combined.
Answering Ohio licensing and scope-of-practice questions from memory of another state's rules, for example assuming that the license transfers automatically or that medical treatments such as deep chemical peels fall within the esthetician's scope.
Candidates move from neighboring states or train with generic national material and never read the Ohio Revised Code and Ohio Administrative Code sections governing esthetics, so scope boundaries and continuing education requirements are guesswork.
What to do instead
Read the Ohio statutes and administrative rules for cosmetology and esthetics directly, and build a one-page summary of license renewal cycle, continuing education hours, sanitation requirements, and the boundary between esthetic services and medical practice. Mark anything you cannot verify as needs review rather than guessing.
Ignoring professional ethics and client-communication questions, such as disclosing a client's skin condition to another client or continuing a service when the client asks to stop, because these feel like 'soft' topics compared with technical content.
Candidates focus study time on procedures and chemistry and assume ethics questions are common sense, but the exam frames them as specific scenarios with a defined correct action.
What to do instead
Write five short scenarios (confidentiality breach, a client who wants a contraindicated service, a dissatisfied client, a coworker practicing outside scope, a request for a service you are not trained in) and for each write the response that protects the client, the record, and the law. Practice stating the refusal or referral clearly and without judgment.