First and foremost, oil-free makeup remover is a must-have product to add to your cleansing repertoire. This is because oil can break down the adhesive that is used to bond the extensions to your natural lashes, per Lash Affair. Alcohol can also corrode the adhesive, so keep clear of any products containing the ingredient if you want to keep your lashes fresh. 

With this in mind, makeup products that might require you to use an oil-based remover or alcohol to take off should be avoided as well. This includes waterproof mascara, although all mascara is best left on the table when it comes to keeping your lash extensions clean, per Byrdie.

Instead, find an oil-free makeup remover you love — Editorialist recommends La Roche-Posay Effaclar Micellar Water, among others. Apply some product to a clean spoolie brush or your fingers, and gently brush the lashes to remove any makeup or particles from the day, Byrdie suggests. To round out the routine, pat the lashes with a tissue to pick up any remaining product.