These earbuds were bought last year and were never used until my neighbor gave them to me last April or May. They started working great and i would listen to them on the way to school on the bus. But then suddenly, I go and use them and its alot quieter then before in both and the volume was all the way up. And I also noticed that ambient sound has stopped working too. (Before this happend I cleaned them and i didnt know that its not good to use an alcohol wipe until I saw it say so online afterwards.) Would that might of damaged somthing that has to do with it?