Why does saline spray dry my nose out more post rhinoplasty?

I am trying to maintain regular use of saline spray as recommended to keep my nose moist at 2 weeks post op however I feel that after using the saline spray my nose feels even more dry and stiff. I have tried different brands and not much luck. Some of the tips on the saline spray were too large for my nostril so I purchased a spray with a more narrow tip for application. Any suggestions would be appreciated.