When I removed the cartridges from my clean and clear 420 I noticed that instead of being dirty looking, they were relatively clean. However, there was way more sand in the bottom of the bottom assembly part, if I can call it that, than I normally find. Since the other side of our backyard fence is the Mojave desert, I'm accustomed to having lots of sand on my cartridges. I have purchased new cartridges, but before I install them I just want to make sure that it was just old cartridges in need of replacement, or if I might have a problem. I replace the cartridges about every year or so. I appreciate your responses.
