Septoplasty post-op care: Are you supposed to let drainage dry and scab? Or should the area be kept moist?

I had a septoplasty and bilateral turbinate reduction and cyst removal from maxillary right sinus 2 days ago. I still have heavy brownish drainage with bright red streaks. My post op care said to keep dressing clean and dry. No packing. My nose is so uncomfortable and I also feel like I can taste it in my throat. And I'm spitting large wads of mucus and blood. Pain mild and the most bothersome issue is the congestion. When will the drainage stop and when can I expect the congestion to subside?