There is a nasal rinse made with oregano called SinuOrega that may be more helpful than the saline nasal rinses. Oregano can be effective against fungus & viruses in addition to bacteria.
Also, you might try steam inhalation with eucalyptus or menthol in the steam - this may penetrate deeper into the sinuses than a spray is able to.
Chronic Lyme Disease, Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication/Chemical Allergies & Intolerances, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD ("Secondary Lupus-Like Syndrome"), Osteoporosis, Pancytopenia, chronic malabsorption/malnutrition, etc.; G-Tube; Currently TPN-dependent.
Meds: Zofran, Pulmicort, Heparin (to flush PICC line), Claritin, Colloidal Silver (used topically), IV Milk Thistle, probiotics.