The main thing is to have clean eyes and eyelashes, free of makeup – especially mascara. Some mascaras contain oils that can prevent eyelash extensions bonding correctly. Be sure to use an oil-free makeup remover if removing makeup, and don’t use any oil or petroleum based products on or around the eye area for 48 hours prior (such as Vaseline or moisturizers). Do not have your eyelashes permed – it is very difficult for us to apply extensions on lashes which have been permed within the last 2-3 months, as often the extensions will not bond correctly. If you have had a more gentle lash lift which has dropped, that should be ok.