Thanks for writing to H.C.M. for your query
I have gone through your query regarding maxillary sinusitis
and thick sticky mucus difficult to remove. Here I would like to suggest you that antibiotic (ceflexin) you are taking this after the sensitivity test of your nasal swab or not , because antibiotic in all chronic infection should be taken according to culture and sensitivity report.
Here I would like to tell you that you should also take MUCOLYTIC
and DECONGESTANT to thin out your secretions and to minimise the secretion. STEAM INHALATION will also be of much benificial to you.
If by above treatment you becomes allright than fine otherwise you should consult an ENT specialist
to investigate you and evaluate for surgical correction (Functional endoscopic sinus surgery
)to get permanent relief.