Some greases seem to repel everything but dish soap. My latest bike was a display model from 10 years ago and the grease in the bb was this foul-smelling brown stuff. Simple green didn't do anything to it but it broke right up just using joy, or whatever it was. Also, the toothbrush I use to scrub parts with- parts I've usually sprayed with some sg, nothing cleans it up except dishsoap. SG has some weird properties, some things it works great, others it's quite ineffective.