I can keep cleaning this filter out for eternity, it's meant to be cleaned and not replaced, but because of the amount of dust that accumulates in these duplex units, I really think that I want to get a slightly thicker one so that it can collect twice as much dust in it and maybe that will help keep any of the tons of extra dust particles from landing over every square inch of my house.
I'm tired of trying to dust it every other day.







I'd be tired of cleaning it that often, too. My AC filter is replaced monthly, but from the looks of it I should probably be doing it more often than that.