I have been using a mixture of 10PPM homemade CS (approx. 80% ionic) along with 
a Xylitol based mixture called BreatheaseXL by HydroMed, Inc. that contains 
sodium chloride, sodium bicarbonate, xylitol, potassium chloride,  and calcium 
chloride.  I put about 1 T of CS into my waterpik bowl and fill it about 2/3 
full with warm water and a scoop of the BreatheaseXL, then irrigate my sinus 
cavity with the solution using a special applicator tip from HydroMed that fits 
the Waterpik... I started doing it two years ago because of chronic sinusitis 
and catching about 6 colds a year... I have not had so much as a sniffle in the 
past two years... a true miracle for me...  Started doing it once a day for 
about a week... now I do it once every ten days or two weeks prophylactically.  
Nebulizers are meant to be inhaled into the LUNGS... they are not meant to 
treat sinus conditions. Nasal irrigation is the way to go for sinus problems 
IMO.