Hi, I would like to ask about the problem on KM 3530? I've noticed that some of the touch screens of my machine has some kind of residue or something moist which causes the screen to malfunction (it hangs). Is there a way to resolve the problem aside from replacing a new one? . I don't have problem on the calibration and even if i do the U201, problem is still there. We tried to use a blower (hair dryer) on the panel, the moist disappear but it is only temporary because the problem return again after several time of touching the screen . By the way I would like to ask if, is this one of the disadvantage of this machine?
What are other most encountered problems on this machine?

Thank you very much