x-pack said:
Mr Sheen is pretty good. It's water based so go easy on the card same as you would putting any water near card. Spray on a lint free cloth and carefully wipe.
I've never tried it but I would be wary of WD40 simply because A. it smells strongly, and B. it's oil based. WD40 is excellent for cleaning residue off metal but not sure about plastic. Certainly wouldn't get it on card just in case it has chemicals that can damage print.
With respect, there's nothing to be wary about. To repeat, I have used it successfully many, many times to remove sticker residue from card bubbles with no ill effects at all. I appreciate if you've never tried it, it might sound weird or even risky, but it really isn't. It smells strongly because the oil is suspended in volatile hydrocarbons which evaporate very readily (as they are designed to do, to leave the oil behind where you've deposited it) and hence reach your nose. And although I did say that I jokingly refer to it as a universal solvent, it's never damaged any plastic that I've used it on, and I've used it on plenty.
As for getting it on the card, well yes, I would certainly avoid that if possible, which is why I use it sprayed onto a tissue first rather than directly onto the bubble. However, I have cleaned tape residue successfully from a Palitoy full colour AT-AT box using the same method, after all other attempts at removing the residue failed. WD-40 not only did the trick, but again, there were no lasting ill effects. I'm not saying it's my cleaning method of choice for cards or boxes (although it certainly is for plastic bubbles), but in a pinch, providing you're careful, it can be used successfully.
Having said all of that, whilst I have never used 'Goo gone' myself before, if that is a product specifically designed to remove sticker residue, then I would be foolish to question the other users here that have recommended it. All I'm saying is that if you don't have any 'Goo gone', WD-40 is perfectly safe to use on plastic in the way I described in my first post.