Leave it until it gets a bit softer at the bottom......but not too soft though.

It gets sweeter the more you leave it, but left too long it goes to mush.
Like a Melon really, to gauge how ripe it is. Either way, it will taste yummeeeeeeeeee.!!
Nice one Gibbo, can I put my order in for two years time......I am a patient bloke.:2fun::2fun: