Product review (2 stars): No white dust, BUT
This product delivered on eliminating white dust, but it clogged my furnace air filter.  I put a new air filter in at the same time I started using BestAir and two weeks later the furnace filter was clogged.  Replaced the air filter and stopped using Best air and the problem didn't reappear.  Just a coincidence you say, well maybe.  However, BestAir did put a film (not white dust) on the table that it was sitting on and it did take some scrubbing to remove it.