I have had my Vamo for about three months and love it. It has basically given me great service, is easy to use, feels good in my hand, and works great with my devices. Recently the two small control click buttons basically collapsed and no longer click. They still work when I press them, however they no longer return to their upright positions. Is this a common problem with the older models and will they eventually fail completely. It started with the buttons sticking even though I have not spilled anything on them like juice and then the click mechanisms failed.