Ive used lash dye for years on lashes and brows and I've used all different brands and they usually work well. Ensure that lashes are completely grease free otherwise it won't adhere. However I now find that it doesn't work well on gray/White brows where's as it used to work on fair/ blonde ones. Try a salon dye when they are open, it's much easier for someone else to do it as they can see more clearly where to put it.