The time needed depends on the fruit, the thickness of the slice and the dehydrator's power. The best way to find the right consistency when making chips from a new type of fruit is to try them every four hours.
If you want to get a new taste, before drying you can cover the chips with syrup or your favourite liqueur using a paint brush or a spray-bottle.
You can also sprinkle on some spices, for instance hibiscus or curry powder or any form of sugar: granulated, icing sugar or flavoured sugar. Have a play with the options to find the magical combination.