You can go on with the same old stuff and have a sinus infection for the rest of your life. Sinus infections have a way of lodging in the upper sinuses, where antibiotics, nasal sprays and irrigations, or other drugs don't reach because of minimal blood circulation.
The only thing that does work against chronic sinusitis that resists medical treatment from the finest doctors (note: many doctors, even ENTs, have chronic sinusitis) is a FlipTurn Sinus Flush
http://www.medhelp.org/user_journals/show/2322
The Flip-Turn Sinus Flush is mildly risky, because you have to bend over to do it, preferably in a shower, but you can also do it outside on soft ground.
Regular sinus rinses don't work in the upper sinuses, because gravity is more powerful than the force you can safely use to squirt it up to your upper sinuses. By now, the bacteria are close to being drug-resistant.
Good luck, friggy