@kaybast, I learned that Pseudomonas bacteria protects itself from antibiotics by producing a heavy biofilm around itself. I started rinsing with saline and serrapeptase drops. This is an enzyme that reduces the biofilm. Then I would follow that with a saline rinse with Levoquin. That killed it after 3 years! I wish you well. Serrapeptase drops can be found on Amazon. I would add two droppers full to the saline rinse.