Unusually Odorous Dyna-Glo Kerosene Heater
 

This is a radiant type. My old Kerosun Omni (convection)
has nowhere near the odor of the Dyna-Glo. The DG has been
used very sparingly and was just rerfillled with fresh K-1
kerosene. I have tried slow-burning the wick, although
it appeared to be soft and without carbon deposits. No
change.
On ignition, the heater always emits a puff of black
smoke. When running I have noticed that the flame
(if adjusted blue) does not go all around the chimney.
What could be wrong?
Thanks!
Frank.