I use a stiff tooth brush.
Can someone tell me where I put mine?If you have a Beretta they actually make a tool - much like a tap - that will clean the threads in a snap.
The metal key for 12 gauge chokes with brass thread cleaner for the Optima-Choke High Performance (OCHP) and Optima-Choke (OC).www.berettausa.com
I also recommend a 10ga brush. Makes quick work of a mundane job.Brass 10 gauge bore brush, WD-40, stiff tooth brush and an air compressor. Relube your chokes, put them back in and run a bore brush with swab through the barrels. Should look like new until your next outing. Repeat as necessary. Good shooting, Rey