The audio-guide return trolley

An original notice containing five intentional errors.

Please return your audio-guide to the trolley beside the exit before the building closes. Staff can then switches off each device and check that it is charged. The headphones should be wound loosly around the handset so that the cable does not hang over the edge. Every slot on the trolley have a number that matches one of the handsets. If you find a device in a diferent room, hand it to the nearest steward. Steward's at the exit can answer any questions about the building's history.

Proofread the notice. Identify the five errors and write the correct forms. You do not need to rewrite the whole passage.