Are there any problems that accrue from nasal irrigation?

i bought this nasaflo neti pot system today and it seems like a good idea an seems to work pretty good but my question is doesn't it wash away any good bacteria or mucus that would have potently caught a germ but didn't because the mucus got washed away? in one of my classes i had to watch this episode of opera and they were talking about a certain female hygiene product that wasnt as good for women as originally thought because it washed away the good as well as the the bad. i was just wondering if this was like that

well you are right. Your body has it's defences. Blow your nose or sneeze. If you get too stuffy use an agitator humidifyer and a small amount of salt to get the juices flowing.

your nose will hurt?

I used nasal irrigation for a while, and it did help. You know how you can hold the other nostril shut or put air pressure in your mouth to control where the saline solution goes, right? Well, once I must have done something wrong, and my ears started hurting. I don't think I got an actual ear infection, but I believe I could have. Many things in your head are interconnected, so be careful. But overall, it's probably better than taking decongestants all the time.

Edit: In response to the answer below.

The original question was about nasal irrigation, not about nasal sprays. Nasal irrigation involves rinsing the nasal passages with saline solution.

You can actually damage your sinuses with nasal sprays and you are better off without them. Nasal sprays and antibiotics only give you a bit of temporary relief.

Taking 6 high strength odourless 3,000 mg garlic oil capsules every day will help your sinus problems. Garlic will boost your immune system and is both an antibacterial agent and an antimicrobial agent.

Mucus generating foods such as dairy products and red meat can be replaced with soy milk and white meat.

Apple cider vinegar also helps a bit.