There are three points to consider:
First, your client may not have followed the aftercare and may have exposed their lashes to hot water, steam, shampoos, cleansers, eye creams or serums within the first 24 hours.
Second, the product may not have been rinsed off well enough during removal.
Third, the lash lift may not have been dried well enough during the appointment to show the full extent of the lift. As the lashes are wet after the treatment, they will be weighed down by the water. Once they begin to dry, they may show over-processing or incorrect lash placement on the silicone rod. Be sure to dry your client’s lashes well before they leave.