Have you tried giving your coke an acetone wash before doing it? Cocaine acts as a nasal decongestant if its clogging up your nose, its not coke. My nose has never been fully clogged but after a gram or so it starts to not work *as* well, I usually just grab a quick spray of dristan and its good to go.
*note*
To those who want to say horror stories about using nasal decongestants "omg i was hooked on it for 4 years" no. You wasted your money. YES your body builds a tolerance, so you learn how to use it PROPERLY, as opposed to just snorting it whenever. Spray it in both nostrils as needed for 3 days. After 3 days, stop spraying in the left nostril but continue to spray in the right. Your left will be quite clogged. After 2-3 days, your left nostril will finally open up and be able to breathe again WITHOUT the nasal spray, at which point you discontinue use. Anyone who claims to have been "addicted to nasal spray" for more than 1 week, is really just addicted to wasting money for no reason lol.