Ok, just a thought here. One time I cleaned something and noticed it was dirty in only hours later. Silly as it may sound this is what happened. The cleaner left a residue and it became ever so slightly tacky. It attracted all the dust in the room is seems. Anyhow, after you clean try rinsing thoroughly. Might help a bit, I don't know. But seeing as you 'clean' so much, it just might be the cleaners themselves. As for using wahl oil. Only use it AFTER everything is spotless. It will be counterproductive to put it on in one place while another is still dirty as it will only track the dirt as well. I hope that helps.