I had just taken my old mini twist out. I was wearing them for about three weeks. I had some things to do, so I was not able to wash my hair immediately. You can also roll the hair up in a bun, if you prefer to not leave the ponytail hanging.
I got my banana clip from Walgreens or CVS over a year ago. They are a bigger size and thicker than the normal banana clip. Not sure if they still carry these.