Wrong sorts of solvents. You need something oil-based.

Eucalyptus oil or paint thinners really tear through sticker goo, but they're too aggressive for painted or plastic surfaces.

Mineral spirits is less harsh, but can still damage some paint or plastic.

WD40 only just does it, requiring a fair amount of elbow grease as well, but it won't hurt paint or plastic. Keep it away from rubber though.

My rule of thumb is the quicker a solvent evaporates, the more things it dissolves.