Ixxe

Maybe someone can help. I get continuous parking sensor beep about half the time i drive, i've notice that they work fine on shorter period of time driving but eventually after been driving for some longer time the continuous beep comes up on reverse.

Is this normal? Can it possibly be the smaller amount of dust causing this or is one of the sensors not functioning properly after a while? I can hear and feel them tick. haven't had an opportunity to check this with vag, maybe someone had similar problem.