Removing stickers from GBA boxes

Anyone have any advice. I've tried rubbing alcohol and it generally works but are there any better solutions to removing the stickers without wrecking the boxes?

I'll tell you a secret.

First you need vinegar and egg.
Pour the vinegar into a big glass bowl (however much you think you'll need), then add the egg and mix it all in.
Then, you need to take a slice of cheese; any kind will do.
Microwave the cheese on a plate or whatever until it melts, then scoop it into the bowl and mix. Now here's the super secret part: put in a little baking soda. Just a tad. Mix well.

Put the mixture in the fridge for a few minutes, take it out and then apply the mixture onto the sticky area. Works wonders.