Always check exotic fruit carefully before buying: look out for softened patches that can develop into a bruise with ripening. Where possible, sniff exotic fruit: firstly, if it is a fragrant fruit, its smell will indicate ripeness; and secondly, some fruits, such as pineapples or lychees, will smell slightly fermented if they’re fermenting (unseen) inside. Choose plump, fresh-looking fruit that feels heavy for its size. If it looks dull, shrivelled or just not quite right, don’t buy it.