olfactory

So it seems like everyone here pretty much is always heating or burning something. Do any of you ever get fatigue to the point where you can hardly smell the scents? If so, are there any techniques to being able to constantly burn incense or heat woods and still smell them clearly? Or just...

Has anybody tried the new Oud Ehab from Ensar oud, if you did please leave your feedback on this oil. I want to know your opinion before I buy it. Thank you so much.