My HUXWRX Flow 762 gained 1.4 oz fairly quickly after shooting some dirty 5.56 rounds. Now I'm struggling to get it back down to the original weight of 10.51 oz. I should have cleaned it when it had gained 0.5 oz.
So far two cleanings using HUXWRX recommended method, Suppressor Sauce, has dropped the weight back down to 11.32 oz. Just soaking the Flow 762 in their cleaning solution does not work though. With soaking a flushing, very little debris was removed. In fact when flushing after the first cleaning, very little water was coming out the vents.
A ultrasonic cleaner is needed. After soaking in Suppressor Sauce for 2.5 hours and rinsing, placing the Flow 762 in an ultrasonic cleaner for 2 minutes in tap water would loosen a lot of debris that is then flushed out with a water hose. But you have to use the ultrasonic cleaner several times to flush out the carbon.
After a second cleaning using Suppressor Sauce and several 2 minute runs in the ultrasonic cleaner, water was finally flowing out the vents.
The problem with the ultrasonic cleaner is that it will slowly eat away at the cerakote finish. Also both the Breakthrough and HUXWRX cleaners are hard on cerakote. As is heat, so the finish is not going to last anyway. Might as well do what it takes to get the carbon out.
I believe that the flow through suppressors require more weighing and cleaning than a standard baffle design. The small passages that the gases are routed through are easily clogged. The newer PIP (Purposely Induced Porosity) suppressors from PTR and Dillon may clog even easier than a Flow 762.
So weigh the suppressor before you use it and clean once it gains 0.5 oz.
