I have a question from a couple of my students who use Perky Duck as pasted below: "At random times when we are brailling nothing appears on the screen, we can also not delete anything. When this happens we try switching it off and restarting, but this does not always help. The problem seems to be getting worse which is very frustrating this close to the final exam. This problem happens not only on the computers at school but also on my laptop at home." Is there any advice I could send them?
