Is there an easy way to remove "tar" that builds up on a stainless steel pan? The interior of this pan was clean before I seared a steak in grape seed oil at very high temperatures the other night and it darkened significantly when I did a fairly lengthy high heat reduction for the sauce. This picture is of the pan after I ran it through the dishwasher. In the past the only thing that worked was scouring long and hard with steel wool and an abrasive cleaner like Comet. I know there are many cleaning tricks out there so I'm hoping there is one for my problem. Anybody had a easier way to clean this pan? Thanks!