Cracked stock

[slow_runner]

I am seeking advice from the esteemed members of this forum (but not exclusively).

Even though I had sworn off any BSAs post the Cadet Major series I relented and bought an Airsporter.
Its the satin-black painted EN series in 0.177"

http://img.photobucket.com/albums/v3...psfd28b444.jpg

My question is this; are they all prone to stock splitting in this region?
A local wood turner artisan has recommended using titebond3 wood glue for a secure repair.

Above
http://img.photobucket.com/albums/v3...ps73754fae.jpg

Below
http://img.photobucket.com/albums/v3...ps953a654c.jpg

http://img.photobucket.com/albums/v3...psea80515f.jpg

There is some oil/dirt to be removed first though. This contamination does not appear to be full depth, likely superficial.
How can I best go about cleaning this prior to applying the glue?

Cheers.