Do you gargle often?

I tend to use mouthwash occasionally. I used Dong-A Pharmaceutical's Original Mouthwash; the price was reasonable, and it left me feeling refreshed after using it when I couldn't brush my teeth. I have tried other products, but while I used them to sterilize my toothbrush or for gargling, the consistency was definitely too strong, so my teeth would sometimes feel sensitive; therefore, I couldn't use them often. What kind of mouthwash do you all use, and how often?