I've used Sig's Model Cleaner with good results. Best tip is to go down to one of your wharehouse stores (Costo, Sam's Club, etc.) and pick up a bag of 50 microfiber towels/cloths for between $10 and $12. These things suck up the oil to the extent you almost don't need a liquid cleaner. You can get several uses out of one then toss it in the wash.