How do I remove the adhesive of the sticker from the Nintendo DS?

I bought a used DS in top condition cheap, but had a housing "skin" on it, I got off on the outside successfully, but inside remained the adhesive residue (black) and if I sogut as possible to get a job what, then At least the black "movie" is still on it, it looks like it's dirty.

How can I get it "clean"?

Try it with glass cleaner. Otherwise, glue goes well with cleaning gasoline away. But do not think that is good for the plastic.

Alcohol from the pharmacy or nail polish from the girlfriend or mum easy with zewa or klopapier

Isopropanol

I would have heated the whole thing with a hair dryer before I tried to turn it on. Heat often causes the glue to stop.

Pure alcohol, WD40