Good to know! I've cleaned just over 200 and the water filter isn't dirty so much as just losing its integrity, so I imagine I'll swap it out before too long. Though as I noted in a post above, I may not be using that small-filter system anymore, so we'll see. Interesting about the air filter because I haven't seen anything on it, though I did just wash it for the first time.I've cleaned about 400 records and just swapped out my water filter for the 2nd time and air filter for the first time. I also wash the water filter every night after a cleaning session and it's never been filthy I do notice a bit of dirty on it.