Len seboy

dont use nail polish remover, it may muck up the plastic. scrape the glue off in small chips/flakes with an exacto or similar held perpendicular to the lense, and lightly scratch at it, touch only the glue, not the lense, the glue will flake off. If the edges have turned white, toothpaste is an extremely fine abrasive and may remove the white (dont ask, if youve been there you know what I mean).