i followed the directions and one side will not allow any solution to flow through.

The solution must come out of the other side and if it is not coming out, I request that you call our office and one of our customer service staff will help you and if you still have further questions, I will be able to help you. At times we have requested people to take their mobile phone, cell phone or cordless phone to the bathroom. They can put it on speaker mode and our staff can then advise how to do nasal irrigation so that they can feel comfortable and get the real experience of nasal rinsing.