Ayr saline gel Ok to use inside the nose?

I being using Ayr saline gel since i have surgery 4 months ago because my nose gets really dry specially at night. But know I am worry because I read that the gel have parabens and that they are cancer causing. I use ointments too like Vaseline and aquaphor but I hear that Petrolatum can cause pneumonia. Can someone help me get a clarification on this, if it is true or not? and if there is any other products that I can use. Thank you!