Which of the following is a common mistake clients make while tanning?

The answer focuses on the common mistake clients make when they do not adequately prepare their skin prior to tanning, which includes failing to exfoliate and neglecting aftercare. Proper exfoliation before a tanning session helps to remove dead skin cells, allowing for an even and more effective tanning result. When clients skip this step, they often end up with uneven tans or patches of dry skin that can affect the overall appearance of their tan.

Additionally, aftercare is essential for maintaining the quality and longevity of a tan. Skipping moisturizing and aftercare can lead to premature fading and dryness, impacting the results of the tanning session. Therefore, the combination of neglecting both exfoliation prior to tanning and the required aftercare is a significant error that can diminish the tanning experience and results.

In comparison, other choices touch upon different aspects that may not be as commonly recognized as major mistakes affecting the final tan or overall tanning experience. For instance, while over-exfoliating or using a tanning lotion before exfoliating can cause problems, they may not be as prevalent as the issue of skipping both initial preparation and aftercare. Bringing pets to a tanning session, while potentially disruptive, does not directly affect the tanning results themselves.