My young daughter has been using this 8-year-old camera, which still takes good pictures. However, recently the date and time need to be re-set every time it is switched on, it will not keep the settings when switched off, which is not really acceptable. Anyone know of a way around this please? The Canon website has no firm-ware upgrades for this camera. I do not like to throw out something which is still otherwise serviceable!! Any advice would be much appreciated, thank you.