Crime SceneCar wash customers in the UK say they’ve been offered less-than-legal services while trying to get their vehicles squeaky clean. The Express reports that several car wash businesses abroad are being investigated for human trafficking to see how widespread the problem is. Customers who complained to law enforcement said they were asked if they wanted to come inside the business as they drove through for a wash.

“We’re seeing a trend across North Wales and the UK where single male customers are going to hand car washes and are being offered sex,” said James Coy, the North Wales Anti-Slavery coordinator.

Officials said the area has mainly seen cases in two neighborhoods but Coy worries that refugees from countries such as Syria could be exploited as they seek shelter in the UK. In the meantime, car wash customers are being asked to report all incidents.