Originally Posted by
JiveTurkey
2) Try spraying in some WD-40 to loosen up the grease.
That's what I'd do, tilt the back end way up and blast away with the nozzle straw inside the chainstay. OP can also use starting fluid, carb cleaner or brake cleaner, though the last two might dull the paint.
Re magnets: they don't work too well on stainless bearings, or if the frame is steel.