When you first get your eyelash extensions, you are advised to avoid wetting them for 24 hours. Dr. Shotter pointed out that many people are then afraid to wash them at all, as they are worried the extensions will fall out. "This leads to a buildup of debris and bacteria, the perfect habitat for the Demodex mite," Dr. Shotter said.
However, you're only ever going to be more susceptible to Demodex if you don't practice good hygiene. "The purpose of eyelashes is to catch dirt and debris — keeping it out of the eye," Dr. Green said. "When you wear eyelash extensions, you're more prone to debris getting caught in the lash line; therefore, daily washing is mandatory."
Dr. Green also noted that practicing good hygiene starts at the salon, as Demodex can live on lash applicators and tools and spread. "Make sure you do your research before booking an appointment to make sure this place is 100-percent sanitary," she advised.