or you can do it the cheap way
A little sea salt (do not use table salt) and warm water. 1 teaspoon per cup of water
and find a wter bottle(bike rider style) and stick the nozzle up your nose works the same.
Don't use sea salt! There can be algae in it that can cause other sinus problems.
Don't use IODIZED table salt.
It recommends using sterile salt, but that's more expensive than crack.
I use non-iodized table salt. It works just fine.
It's amazing how much dust and lint a person can get in their nose often.
If you get a lot of sinus infections, have the doc check for a deviated septum. Those can be factors in repeated and chronic infections. If you are willing to have surgery to correct it, many of those infections can go away.