POLICE are reminding people to lock their cars after 23 were found to be open on one night.
Officers in Horwich have been walking round the area trying car doors.
Up to 40 per cent of thefts from vehicles is due to owners leaving the cars unlocked.
Officers knock on residents’ doors when they find unlocked cars to make them aware their car is open.
They then post the results of the operation on social networking sites Twitter and Facebook.
Police Community Support Officer Steve Best said there has been a mixed response about making the results public, prompting some people to check their vehicles while others say it leads the criminals to easy targets.
He added: “The criminals already know, they walk around trying vehicles and we are trying to highlight this by checking the doors and reminding people to lock their cars.”