My dd was one of the unlucky ones who had the problem. We took it back to the Casio authorized repair centre and they replaced it with a new one, but the staff said he cannot guarantee that the same problem will not occur.
Upon receiving the replacement, I apply a coating of transparent nail lacquer on all the buttons. It's been a year, so far so good. Dd said her friends who had the same problem either buy a new one or just live with the problem
They don't make the calculators like they used to anymore. In the old days, the letters are embossed into the buttons, so they are impossible to rub off, unless you wear out the button itself, which is very unlikely. These days, the letters are all painted on. Most likely to be a cost-reduction measure, and a tactic to get consumers to buy more calculators.
Bebebub,
Your suggestion on the nail lacquer is a good idea, I believe at least it will helps to prolong the period before the symbols disappear away again.
ChiefKiasu,
Based on the rate the numbers/symbols on the button is disappearing, I hope I don't need to buy a new calculator for my DD every year. Unfortunately, sometimes she claimed she make a mistake in using the calculator because she accidentally key in the wrong button when she \"guess\" the button wrongly.
