Actually, my sense of smell is getting worse, I think, but that's cos I'm getting older and rundown. (It's kinda fun to go downhill real fast now that's I'm over the hill. :bounce:What has happened over time is that I'm more sensitive to some synthetics and those do bring on colossal splitting headaches. To naturals though I have some allergies and I break out in hives and sneezing fits. Isn't life fun!