BURGLARS are posting tips on how to break into houses on YouTube.
One video features a crook showing how to make a skeleton key to pick a lock used on millions of homes.
In other clips, now removed by the video sharing site, thieves talk viewers through "bumping" and "the molegrip" methods which show no sign of forced entry.
But it means many insurance firms would NOT pay out to victims.
Bosses at door firm Swish said: "This is a worrying and detailed video. Millions of homes could be susceptible to these methods