How To Regain Sense Of Smell: The fact that I can't smell anything irritates me. Your quality of life may significantly decline if you are unable to see the world clearly through your nose, whether it is due to a cold, sinus infection, or something more serious. Smell training is one of the best methods to regain your sense of smell. Retraining and motivating your olfactory system requires frequent exposure to strong, familiar scents. Having said that, the following advice will help you regain your sense of smell.