No matter what anyone claims, silencers need to be cleaned periodically to avoid particulate build up and optimize performance. Here are a few ways you can tell if it is time to clean it:
Weight Increase and Cleaning: To monitor carbon buildup, weigh your suppressor when it’s new and record its baseline weight. After around 3,000 rounds, you’ll typically notice significant accumulation. An increase of 2 ounces or more is a strong indicator it’s time for cleaning. Use an ultrasonic bath with a 50/50 mix of water and Simple Green for best results. Cleaners with heaters work better, as the heat helps break down carbon more effectively than room-temperature solutions. Depending on the cleaner’s power and tank size, 15-20 minutes of hot ultrasonic cleaning should suffice. For heavy buildup, multiple cycles may be required. If so, fire a few rounds through the suppressor between cycles—this helps loosen the carbon, allowing the cleaning solution to penetrate deeper.

Performance Indicators: More than weight alone, pay attention to changes in performance. If the suppressor feels heavier and you notice increased backpressure, reduced sound suppression, or a shift in point of impact, it’s likely time to clean. Carbon buildup can clog baffles, reducing efficiency.