Week one: control conditionsView image in fullscreen Ilana Bean’s dusty coat rack, week one. Week three: adjusting the humidityView image in fullscreen Ilana Bean’s dusty coat rack, week three, after the dehumidifier had been running. Verdict: My dehumidifier habit may have been working against me, because the drier conditions definitely produced a dustier coat rack. Week four: running an air purifierView image in fullscreen Ilana Bean’s dusty coat rack, week four, after the air purifier had been running. I cleaned the coat rack, unplugged my dehumidifier and plugged in my air purifier instead, placing it about a metre from the coat rack.