Stuffy nose

Zeus is a 6 month old Exotic Shorthair Persian. He has a very stuffy nose and it has gotten much worse the last few days. He feels just fine and doesn't have a temp or runny eyes. His nose is so stuffy we had to kick him out of the bedroon because he was keeping us awake with his snorting and mouth breathing. We have tried the room with a vaporizer and I have tried saline drops which are nearly impossible to get in his squishy little nose. Any other advice would be appreciated. Thanks!