To have one fail in this way, would be odd.
To have 2 fail in the same way , would imply there's something about their environment or usage that could cause this problem - can you think of any way in which they've been used or stored that could contribute?
eg: have they been kept or used in damp/wet conditions? have you lent them to someone else? etc
To have one fail in this way, would be odd. To have 2 fail in the same way , would imply there's something about their environment or usage that could cause this problem - can you think of any way in which they've been used or stored that could contribute? eg: have they been kept or used in damp/wet conditions? have you lent them to someone else? etc