actually I found it quite enjoyable (compared to the alternative of "can't breathe") once I improved out my technique.

1. use noniodized sea salt (or a medical saline preparation.)
2. dissolve it in blood-temperature water.
3. use a Neti pot (http://en.wikipedia.org/wiki/Image:Neti_pot.jpg) rather than a syringe; rather than forcing, simply allow the fluid to flow through the nasal cavity.

There are videos of correct neti pot usage on Youtube.