MN Esthetician common mistakes
MN Esthetician · Understand the traps and how to avoid them.
On scenario items, choosing plain soap-and-water washing or a general-purpose wipe as the answer for an item that actually requires cleaning followed by immersion in an EPA-registered hospital-grade disinfectant (e.g., metal tweezers, comedone extractor, hard plastic spatula).
Candidates memorize the three vocabulary words (sanitation, disinfection, sterilization) as definitions but never build the decision rule that sorts an object by material and blood/body-fluid exposure, so under time pressure they pick the answer that just 'sounds clean.'
What to do instead
Before the exam, write out a three-column chart - porous/disposable, non-porous hard implement, skin (not an object) - and practice classifying 20 random items from a treatment room into those columns. Memorize the labels of your state's required disinfectant and the contact time printed on the label rather than a product name, and drill the phrase 'clean first, then disinfect, then dry' as a single step sequence.
Naming the layers of the epidermis in order but misassigning which layer contains the melanocytes, where the barrier (stratum corneum) sits, or at what depth a peel, wax, or microdermabrasion treatment is actually acting.
The layers are usually studied as a memorized word list (Come Let's Get Sun Burned) with no functional picture attached, so questions phrased as 'which layer is affected' or 'why does this client's skin not tan' collapse even though the list is known.
What to do instead
Redraw a labeled cross-section of skin from blank paper daily until you can place keratinocytes, melanocytes, Langerhans cells, sebaceous glands, arrector pili, and the dermal-epidermal junction without looking. For each layer, write one sentence on what it does and one treatment depth that reaches it; test yourself by explaining the diagram aloud as if to a client.
Doing skin analysis only by looking at the face and then writing a vague note such as 'skin looks dry, did a facial' - with no intake form, no contraindication questions, no Fitzpatrick/condition findings, and no products or reactions recorded.
Candidates treat consultation as paperwork to get through rather than the step that legally and clinically protects both parties, and they underestimate how many exam items are built from a short client history that contains a hidden red flag.
What to do instead
Practice a fixed intake script: medications (including isotretinoin and blood thinners), pregnancy, recent waxing/laser/peels, allergies, cold sores, and current home products. Then write notes in a consistent four-part format (subjective, objective, treatment performed, response/home care) for every practice facial so the structure becomes automatic.
Applying massage movements without matching them to skin condition - e.g., using tapotement or vigorous friction over couperose, active acne, or rosacea, or dragging effleurage in a direction that pulls rather than drains.
Candidates learn the names and hand positions of effleurage, petrissage, tapotement, and friction as a physical skill but never pair each one with its indication and contraindication, so they answer 'which movement' questions on technique alone.
What to do instead
Build a two-column table of each massage movement next to its purpose (relaxation, stimulation, desquamation, circulation) and its contraindicated conditions. Rehearse each movement on a partner while saying out loud what skin type it suits, and always review the direction of drainage and the rule that pressure and speed are adjusted to the client's condition.
Re-inserting the wax spatula into the pot after it has touched a client's skin, or re-waxing an area that was already stripped, and treating these as acceptable shortcuts.
These behaviours are frequently modeled in real salons where speed is rewarded, so candidates absorb them as normal practice and then pick the 'fast' answer on an item that is actually testing cross-contamination and skin-trauma risk.
What to do instead
Drill the rule that a spatula touches either the pot or the client, never both: one dip, one application, discard. Practice the full sequence in order - patch test and document, cleanse and pre-powder, check hair growth direction, apply in the direction of growth, remove against it, hold skin taut, apply post-epilation product - and always answer exam items by choosing the option that prevents double-dipping and repeat passes.
Skipping or failing to document a patch test for lash adhesive, brow/lash tint, or lash lift solution, or reusing a tint brush or adhesive nozzle across clients without disinfecting.
Patch testing adds a waiting period the client did not schedule for, and the reaction being prevented (a delayed hypersensitivity response) is invisible during practice sessions, so the risk feels theoretical until it appears in a scenario question.
What to do instead
Memorize the fixed sequence for each service: patch test 24–48 hours ahead, record the date, product, and site, and re-test after any product change. Treat all eye-area products as single-client-use where the label says so, keep adhesive and tint supplies covered and labeled with the open date, and know the immediate stop-and-refer signs (swelling, itching, redness, watering) for scenarios.
Matching foundation to the back of the hand or to the face as a whole, and choosing color-correction shades by intuitive association rather than by the complement on the color wheel (e.g., picking green for sallowness or purple for redness).
Candidates study the color wheel in the abstract but never translate it into a lookup they can apply, and shade matching is taught as 'hold it up and see,' which is exactly the method the exam tests against.
What to do instead
Memorize a correction table: green cancels red, lavender/purple cancels yellow-sallow, peach/orange cancels blue undertones and dark circles, yellow cancels purple bruising. For matching, test three stripes along the jawline in natural light, let it sit briefly, and choose the one that disappears; also record undertone (warm, cool, neutral) and depth separately so the reasoning is explicit.
Running a chemical exfoliation protocol without screening for the standard contraindications (isotretinoin use, recent waxing or laser, active cold sore or broken skin, pregnancy for certain acids, retinoid use) or without knowing how to neutralize and how to respond to an adverse reaction.
The service looks simple - apply, wait, remove - so candidates focus on memorizing percentages and brand names instead of the eligibility screen and the stop protocol, which is what exam items on chemical exfoliation actually test.
What to do instead
Create a one-page contraindication checklist and apply it to every peel scenario you practice, regardless of strength. Learn the difference between superficial and medium-depth action, the pH range that makes an acid effective, the neutralization step for each acid type, and the immediate response to stinging, frosting, or blanching - remove the product, neutralize if indicated, cool, soothe, document, refer.
Answering ethics and communication scenarios with the option that protects the business or avoids awkwardness - continuing a service after the client says it burns, sharing a client's information with a friend or on social media, or giving a diagnosis instead of a recommendation - rather than the option that protects the client and stays inside scope of practice.
These items have no calculation to fall back on and the 'wrong' answers feel polite and normal, so candidates who have not rehearsed a script choose the socially smooth option over the correct one.
What to do instead
Adopt three standing rules and apply them to every scenario: stop the service when the client reports pain or a reaction, never disclose client information without written consent, and describe what you observe and refer rather than diagnose. Practice phrasing refusals out loud ('I'm not able to continue today - let's stop and get this looked at') so the professional response becomes the familiar one.
Studying only generic national cosmetology content and missing Minnesota-specific requirements - for example that a salon must have a licensed salon manager on record, that licenses must be posted and available for inspection, and the state's own sanitation and recordkeeping rules from the Board of Cosmetologist Examiners.
Most prep material is written for a national audience, so state-rule items arrive as unfamiliar detail and candidates guess using another state's rules or assume the general answer applies.
What to do instead
Pull the current Minnesota statutes and board rules for cosmetologist examiners and build a short state-only fact sheet covering licensing and posting, the salon manager requirement, sanitation and disinfection duties, recordkeeping, and scope-of-practice limits. Review that sheet separately from your general material and re-check it close to your test date, since board rules are updated.