Very fine white power from dash-board vents on 2009 Lexus ES350

I'm getting a very fine white power appearing on my dash. I thought it was dust, but when I wiped it away it seem to smear like a powder substance. I changed the inside cabin filter and wiped the dash clean, but within a day or so the powder re-appears. What can this be? Any suggestions for solving this problem?

1 answer 1 comment
since it's in factory warranty, was curious what the dealer says about this???
Overbys Inc,
Could you contact me with your e-mail, please? I have a question for you. My e-mail:
zeekerekes at gmail.com
Thanks,

Zee