Heck yes, we're always telling you to clean your lashes and for every new client that comes in for a full set we even give you a lash brush and some cleanser and tell you how to properly wash your lashes before you leave. Of course depending on your lifestyle and body chemistry not washing your lashes can definitely take a toll on them, some more than others, but you paid good money for these, they look great, you look great, take care of them and you'll get better retention and extend your time between fills, who doesn't want that?