I just brush the walls with a soft wall paper brush---then vac the floors---a heppa filter is needed---
Plan in hitting the primed surface with a sander --to knock off the bits of crud that often end up in the paint ---A quick light swipe is all that it takes---Most novice painters are not aware that this step is needed with new drywall---
Another reason I stopped allowing the homeowners to paint my work.
New members: Adding your location to your profile helps in many ways.--M--
Laying a light against a wall and letting it cast a shadow will show even the best work to look flawed. It is next to impossible to mud a wall and not see where it was mudded with the light against the wall. The next time that happens ask the owner is her or his house clean, when they say yes, just lay the light on the floor and let them see all the dirt they can't normally see. Ask them how many normal people walk around with a light checking like that.
New members: Please consider adding your location to your profile.
If you do what you've always done, you'll get what you've always got.