Dyson DC29 smell since new

\015 Our Vacume has emmitted a burned dust or electrical type smell since new, the machine works fine but the house is left with this terrible smell after vacuming. My only thoughts are that it might be ultra fine dust particles that get past the filter, though there are no visible signs of dust on the motor side of the filter. Any thoughts or similar experiences?\015 – Dyson DC29 Allergy Bagless Canister Cyclonic Vacuum