are you using a microfibre to polish off with?
often people complain of too much dust cos they use a towel that just pushes the polish around, as apposed to a microfibre that lifts it from the surface.
you can tell this cos you need one cloth to poilsh off a car, with dust, wheras i usually need 2 or 3 clean microfibres to polish off, as it picks up all the residue, then you can just chuck em in the wash
also tech wax is very good, i'm trying to find a good post polish, to use after