Using these VLash C Curl Eyelash Extensions is easy. First, pick the right length for your client's natural lashes. You can use them all in one thickness for a full set or mix different lengths and thicknesses for a more customized look. When applying, make sure to use a good quality lash adhesive and place each lash close to the natural lash line. Be careful not to get the adhesive in the eyes. As for maintenance, tell your clients to avoid rubbing their eyes vigorously and to stay away from oil - based products near the lashes as oil can weaken the adhesive. Also, remind them to comb the lashes gently with a clean lash comb every day to keep them looking their best.