While the keycaps are soaking, use some cotton swabs to dust out any lingering particles under the keycaps, around the switches and the stabilizers. If you have any sticky stains in there, dip the end of a cotton swab in some isopropyl alcohol, and give it a scrub to break up the residue. Don’t use the isopropyl alcohol on any keycaps, on the outside of the keyboard case, or on a mouse—it can damage certain materials.
