I've got a 6 month old A3 and over the past few weeks I've noticed that one side of the steering has become 'tacky', eg it feels fine if you briefly touch it, but if you've been holding it for more than 30 seconds it feels sticky when you let go. I'm assuming something sticky has ended up on the wheel (dunno how!), but I'm not sure what's best to clean it and remove the residue? Just water, or are there any interior wipes that are generally good to use?

Any help appreciated