please i'm a baker and i had problem the last time i made some, i discovered they couldn't last more than five days,
i usually use squadron brandy or 501 brandy.
PLease wht can i do to make it last.

If you wrap it tightly a fruitcake will freeze very well. If you really want it to last I'd recommend wrapping it in several layers of plastic wrap, then putting that in a ziplock freezer bag. (If you baked it yourself, you should make sure it's completely cool before wrapping.)

How long it will last will depend on the cake. A really bready one, like most grocery-store fruitcakes, will develop freezer-burn after a month or two.

A hard-core old-time fruitcake, made with lots and lots of dried fruit and soaked in alcohol, tightly wrapped, will probably be safe for six months or more in the freezer. Fruitcakes like that were designed to last; that was the reason they were invented.

If you want your cakes last long, Just don't add milk.
Replace the milk with the same quantity of water as milk doesn't really do much for cakes. It's actually the milk that makes it spoil on time.

add preservative 2 it n make sure ur cake is properly cooked n cooled on a wire rack

Try this- after baking your cake, let cool completely then make little wide slits on the cake (all over the top of the cake), pour teasponsful each of brandy or whatever rum you have into the slits. Allow for a few minutes to let the cake absorb the rum, then refrigerate or freeze. Even without freezing, the cake will keep well at room temperature for upto 2weeks.
When my younger sister was going back to school sometime last year, i baked a cake for her and two weeks after she had gone back, she called to say she was still eating the cake, and she stored it in her locker. The rum even adds great flavour and improves the taste of the cake.