The sticky residue thread

You can use eucalyptus oil to get the sticky residue off, though the plastic may be slightly affected. Others suggest WD-40 or several other products, but eucalyptus oil has a more girly scent. If it doesn't quite get 100% perhaps you can bother handling something more toxic like isopropyl alcohol just to get the last bit.
 
Calling isopropyl alcohol "toxic" is a bit of a stretch unless you're planning on using it as a cocktail mixer, as it's literally the stuff in your medicine cabinet and hand sanitizer. It’s actually the safer bet for most plastics because it evaporates before it can do any real structural damage