LCD display on Audi A4

Hi,

been reading the forums to tray and get some advice on this and there are some about dead lines on the centre LCD cluster, think this is what its called, its the LCD display that gives temp, radio, mpg etc etc.

anyway i know some have experienced issues with dead lines across the display but mine is the opposite, in the bottom right hand side there is a small bunch of pixels that are brighter than the rest and its actually growing over time, anybody any idead what it could be??

thanks in advance