Time to clean your rifle for the next match. You remove your muzzle brake and set it aside to soak. I've used a number of things to soak it in but always seemed like a waste of solvent. So I designed a cup that is just a millimeter or so bigger than the brake. Saves you on solvent. Then I started making them for all the other brakes I could beg, borrow or steal measurements for. 
 
Made of a durable plastic that is chemical resistant. It has been tested with Boretech, CLR, and my personal favorite, "the dip." 
 
Soak that brake for a few hours and the crud just falls right off. Made for a number of popular brakes on the market. If you don't see yours here and it is popular enough to warrant a model, let's collaborate on some measurements and I'll get one made for you and add it to the lineup.