He not, or ever been on tobi, so its not that. No fever, playing normally. I think he is getting his molars right now. Don't know if that has anything to do with it. He always seems to have thick, crusty boogers but now its just clear running, not all the time, on and off. Also seems to get worse while sleeping. After his nap he usually wakes up pretty stuffy. Don't think its a cold, no one else is sick and its not all the time. Maybe I'll give it a few more days and then call his doc.