Assuming the stove has reached a hot enough temperature to clear the curing phase, then there is nothing on the stove that can continue to produce a smell. Below are some common causes of a smell being produced.
The fuel itself is not as advertised. It may be worth trialling a few other brands.
If you have ceramic or decorative logs in your fire, ensure they are not laid over the flames.
This can produce a smell and also cause the flames to rise higher than they should. If you have ceramic or decorative logs around the fire and there is a draught getting into the stove, it may be that the flames are being blown onto the logs, causing them to smell. In that case, you want to try and eradicate the draught or move the logs further away.
The stove is struggling for oxygen. At the end of a burn cycle, the stove can begin to produce a smell as it struggles to burn what is left. This struggle can produce a smell of un-burnt biofuel. The best way to avoid this is to close the flap off as the fire begins to slow down. The fire can also produce this smell at the beginning and to help prevent this, make sure the fuel is at room temperature and not cold. Cold fuel is much harder to light. If the problem persists it may be worth looking at different fuel brands.
If you have not used the stove for a while it may be dust on the fire producing a smell, or something around it getting warm.