I picked up a particularly grotty and smelly xbox the other day - I bought it because I thought the case might be in mint condition underneath the layer of dirt and I was right. I washed the case with fairy liquid (dishwater detergent) and a microfibre cloth but although the plastic casing looks clean it isn't - I ran a baby wipe over a tiny section of the case and it was brown. Same result when I used a baby wipe on the inside of the case - brown residue inside the case as well.
Is there any special paste I should make? Could I make a baking power and vinegar paste? The reason I'm reluctant to try these is I'm afraid I'll damage the case - any one any tips on how to get rid of the brown residue. Thanks in advance.