http://www.nikonchat.com/nikon-camera-cover/

adhesive plastic dirt stuck back cover of the camera, how I can delete? wipe clean soft soap didn't work.?
The camera is a Nikon F80 with a back cover that allows the printing of date. The cover is made of plastic, probably some kind of thermoplastics. I have no idea how he got the sticky substance on the camera or what is just (went there after my sister used the camera). It looks and feels sticky dirt and leaves some stickers in certain areas after taking off the sticker. I tried cleaning with a mild soap solution, but not very useful. The only way I know to the elimination of the substance is slowly and laboriously scraped to one side and then click off but it takes forever and no matter how hard I try, There will always be some dirt on the left. Please help. Thank you very much!
Soak a cotton ball with a little nail polish remover and apply some in the affected area, then clean the area of a movement back and forth. This will remove dirt without affecting the cover, but be sure to clean the cover with warm water later.
Aktiv Pak AP200 All-Weather Sling Digital SLR Camera Backpack Case (Black) for Nikon