My neti pot is my friend, but when I'm at my worst, it only does so much to actually lessen my allergen load. It does, however, often help stave off infection.
I started doubling my rinse packets and when I feel really feel bad using it 2x per day is a must. Here it's more dryness and dust and I find it important to keep my sinuses moisturized. It's hard to believe the gunk I clean out even when things are normal.