Foud this little bit of info " Lens cap does pop off easily, but I think it was designed that way so that if you turn on the camera without first removing the lens cap, the extending lens pops the cap off harmlessly without damaging the internal zoom lens motor. It might be possible that there is grime and dust that hold the spring in the cap from providing maximum tension, so a good cleaning with soapy water and some compressed air might just fix it. Other wise I would suggest to purchase a new cap I'd try places like this http://www.uscamera.com/index.htm or http://www.cameraclean.co.uk/products.php?cat=SLR+Lens+Caps Good luck