I used to scrub and scrub and scrub those greasy pots and pans.  Now, I just put a used dryer sheet in the pan with water (I add a tiny bit of dish soap) and let it sit for a while.  It lifts the gunk out really well. 

You can then use the dryer sheet to scrub out what's still sticking and it'll come right off.  Give it a try.  It saves a lot of time and effort.