PS Vita Button Issues

Hi, I just bought a Vita from a friend and i’ve noticed that the buttons feel cheap, they are squeaky and the B button is sticking. Is this a common issue? And is there anything I can do about it without taking my entire console apart as I don’t usually do hardware mods as I’m scared of messing of the ribbon cables, Ive already tried applying alcohol and it worked for about 10 minutes before the sticking/squeaking resumed. Sorry if this is a stupid question but im a little lost here.