It could be a simple issue, fixed quickly and easily. Foam Cleanser, or as we call it Lash Shampoo or Eyelash Shampoo, it's one of our favourite miracle workers. Lash shampoo for lash extensions helps with retention and long lasting bonds between the lash extension, the glue and the natural lash. The lash foam shampoo reaches hard to see places, cleansing the area of any oils, residues from makeup, dirt and more. The clean eyelashes provide a surface without imperfections for the ideal bond between the extensions and the glue.