Best way to remove grease from seat tube?
 

This is probably an elementary problem with an easy fix, but what's the best way of removing grease from inside a seat tube? I've taken a cloth wrapped around a rod to the inside of the tube, but am wondering if I need to use a degreaser of some sort to remove any remaining residue. . . I'm assuming that everything needs to be removed before inserting a new carbon post?

dip that dauber in some gas & scrub-A-dub,dub. then if you want afterwards you can use some isopropyl alcohol.

mmm. That seemed to work well. Thank you!