Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worked for me!

I have had my Grossman for over three years and used it at least once everyday, but I usually irrigate more. It has made such a difference in my chronic sinusitis. I have had surgery twice, but I use Grossmans along with allergy shots, daily allergy med and once a day steroid nasal spray and am doing much better. I would highly recommend Grossmans. However, I would like to point out that it is important to run plain water through the machine after each use. The salt will corrode the internal parts.