How to make all your WhatsApp messages self-destruct by default

It was just last year that WhatsApp added the option to let your messages disappear automatically, but the company has expanded the feature in a big way. Rather than forcing you to manually enable disappearing messages for each individual chat, WhatsApp now lets you default to disappearing messages for all new one-on-one chats. Moreover, the company is giving you a good deal more flexibility on timing. While previously you could only set messages to disappear after 7 days, now WhatsApp provides