crash alot, Hot glue is not for noobs, it has its dangers and makes the lock permanent, with Blu-Tac or play dough, the diff is physically untouched so to reverse it all you do is remove the Play dough and re grease.. Its a lot harder to do with Hot glue..

There are many methods but the Blu-tac and Playdough are more noob friendly..

I have even heard of a paper locker, Opening the Diff and Cramming paper in between the gears is also suppossed to work..