Many people have problems with dry nasal passages and sinuses. Cool mist humidifiers are a good way to help this problem but if you need something more you may want to consider nasal irrigation with a saline solution. You can find this product at any pharmacy and you don't need a prescription to get it. In fact Afrin just came out with a new product composed of purified seawater. The advantage to this, or so they say, is comfort.
Ah, comfort. Those of you with childhood memories of sucking swimming pool water up your nose may be a bit wary of nasal irrigation. I've actually never tried it myself but the practice has been around for centuries. Saline is more closely composed to our own body fluids so shouldn't be as irritating as regular water, especially water that's been heavily treated with chlorine. Anyone who has used nasal sprays (such as Afrin) in the past will probably do just fine. The rest of us might have to put on a badge of courage and hope for the best!