I use apsen too, and even after being in the snake room on day 1, setting up all the cages with fresh bedding and what-not, I came into the house and my wife still complained she could "small the snakeroom" on me. Friends come over and might poke a joke when they walk in "Ahhhhhh, the smell of reptile poo" when actually, there is none in the room and the trash is empty.
I'm going to use up my last stores of apsen and consider switching to something else, at least pine for a bit and see if I notice anything.
I have one of those cheapo $50 ionizers in the room, running constantly, and a ceiling fan, but zero ventilation in the room which doesnt help. I can't say for sure if the air cleaner does any good, it's a hard thing to test I guess.
I've been toying around with the idea of buying 2 bathroom ventilation fans and installing them in a push/pull method by simply reversing the polarity on one fan. I'd have the option to vent out to my garage, or out to the outdoors, but as soon as I do this I feel like I'm giving up some of the efficiency of my temperature control in the room.
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Tom
"The more people I meet, the more I like my snakes"