The eyelids are a very delicate area that requires careful treatment. It isn't necessary to polish the client's eyelids with cotton buds or discs. Yes, I understand that you need to clean out all the remains of cosmetics and skin secretions, but you need to do it gently so as not to cause discomfort and irritation.

Never use products for cleansing lashes that aren't intended for this, for example, alcohol-containing and oily products.

Even if the client came without makeup, you need to thoroughly clean the lashes before the extension. Pay attention to the inter-ciliary space, where most often the remains of cosmetics and skin secretions accumulate.

Some lash techs use tonic or micellar water instead of a degreaser. This reduces the quality of lash preparation. So you can dry the skin of the client's eyelids, and subsequently, the coupling of lashes may deteriorate.