Twitter Inbox Cleaner (by @levelsio)

twitter_inbox_cleaner.js

// 
// Twitter lets you close your inbox to people you don't follow. The problem
// is that still authorizes ANYONE who sent you a message EVER to continue 
// messaging you, even if your privacy settings are changed.
//
// The only way (I think) to avoid that is to delete every message from a
// person so that Twitter's internal check "did you talk to this person 
// before?" results in FALSE. That sucks because maybe you want more privacy
// than before. But it's do-able by deleteing all the message history of each
// conversation.
//
// Since @timwhitlock's Twitter DM Cleaner went offline due to Twitter's
// changed API, I wanted to find a way how to empty my inbox without having
// to literally single-click every message
//
// USE AT YOUR OWN RISK THIS WILL DELETE ALL YOUR TWITTER INBOX MESSAGES
// YOU CAN NOT RECOVER THEM, MAKE SURE TO BACKUP BEFORE, YOUR TWITTER
// EXPORT DOES *NOT* BACKUP YOUR INBOX THOUGH!
//
// INSTRUCTIONS
// 1) Open your messages
// 2) Paste below in your console
// 3) It will open the first message/person
// 4) Start clearing messages from top
// 5) When done, it goes back to inbox
// 6) And it selects the next user's messages
// 7) To kill it, close your tab
//

$('.DMInboxItem').eq($('.DMInboxItem').length-1).click();
setInterval(function() {
	$('.Icon--delete').eq(0).parent().parent().parent().parent().find('.tweet-text').text();
	$('.Icon--delete').eq(0).click();
	$('.DMDeleteMessage-confirm').click();
	if($('.DirectMessage-text').length<2) {
		$('.DMInboxItem').eq($('.DMInboxItem').length-1).click();
	}
},100);

Uncaught TypeError: Cannot read property 'eq' of null
at :2:18
(anonymous) @ VM118:2
Help please

Got this error Uncaught TypeError: Cannot read property 'eq' of null
at :1:18