Try Adam's Carpet and Upholstery Cleaner. On my previous car, I had an Alcantera steering wheel as well as an e-brake and they used to get grubby. The Adam's product worked FANTASTIC! The alcantera was like new every time I re-cleaned the wheel and e-brake. I'm assuming that light blots with a microfiber would suffice.
Adams Carpet and Upholstery Cleaner
I originally found the product through Detailer's Domain
. Phil gives a coupon for $10 off a $50 order when you first register. He's on A LOT of other forums (first found out about him years ago on a Subaru forum) and have seen some of his work first hand and it's amazing!