Ive had 3 babies and all of them as newborns were very gassy. along with the gas is crying, so Ive tried it all believe me. it works. Iam not one to go and stick something in my babies bum. Iam nervous and I don't want to hurt them but this was very easy to use and boy oh boy did they let it go. I don't know how it works but it does. You will have one happy baby afterwards. I still have some left over and Iam gonna hang on to them for future babies. thanks the windi!