DDJ SX 2 Cue Button

I have recently had my ddj sx 2 for around a year and the left hand cue button has started to play up, it is stuttering and isnt working as it should with the other one being perfectly fine. It will sometimes work but on the whole is stuttering when being pressed. Aany ideas? If it sounds like I need a new button does anyone know in the UK where I could have one installed?