when to FOG-Before or after outbreak??

For the last 2 years, in mid-June, we've had a mild outbreak of TINY little bugs in out master bathroom. They are all around the tile floor, including inside of the tile shower. Our exterminator didn't know what they were, and after spraying, they still came back (the bugs, not the exterminator).

Anyway, I'm doing my own spraying and fogging this year, and wonder if I should do it before they outbreak (I noted the dates last year), or I should wait until I see them. Thanks!

**btw, they are really small, look like bits of dust moving around***

 

Neither

Fogging is one of the most ineffective ways of dealing with an insect paest problem
The life span of most flying insects in measured in hours or at the most days
So treating the symptoms does little good

What do these bugs look like?

You say tiny, are we talking gnat sized?

It sounds like these may be a form of phorid fly which are caused by standing water and/or humidity
You have to find the source and eliminate it

There is a product called Drain Gel or Bio Gel that you mop with and then pour the water down the drains.
It dissolves organic matter that flies live in.
The old fix was to pour bleach in the drains but there is some evidence that that encourages the eggs to hatch which may prolong the problem