I keep a bottle of Shooter Choice on the side and only use it to soak the brake in. Normally, I leave the brake submerged in the fluid for an hour or so. I have a Vais brake and it is a royal pain in the butt to clean.
just cleaned my answer brake after about 1K 308 rds...didnt really need it, but i was seeing blue in the holes from copper vapor, so i figured it was time [img]/ubbthreads/images/graemlins/grin.gif[/img]
wipe out, then rinse with water, then ballistol, then drain and wipe.
will be using an ultrasonic from now on, if harbor freight ever gets tham off backorder!!