What common mistake should be avoided during the waxing process?

Using a single applicator for multiple dips is a common mistake that can lead to contamination and increase the risk of infections. It is essential for estheticians to use a new, clean applicator for each dip into the wax. This practice helps maintain hygiene and the integrity of the wax, ensuring that bacteria from the skin do not enter the wax pot.

Other choices, while also important aspects of the waxing process, are not as directly related to sanitation. Pulling the strip too slowly can lead to discomfort for the client and may not remove all the hair efficiently. Failing to clean the area before waxing can increase the risk of irritation or skin infections, but it does not directly compromise the services rendered as significantly as using a contaminated applicator. Applying wax in the wrong direction can affect the effectiveness of hair removal but does not introduce the health risks associated with contamination from a single applicator.