The invention relates to a wiper device (100) for the cleaning of vehicle windows (1), with a wiper blade (10) having a wiper rubber (12), which wiper blade is able to be fastened exchangeably on a wiper arm (2) by means of a wiper blade adapter (11), wherein between the wiper blade adapter (11) and the wiper arm (2) a detent connection (15) is constructed, which comprises a detent element which is arranged on the wiper blade adapter (11) and which engages in a form-fitting manner into a corresponding opening (16) or recess on the wiper arm (2). According to the invention, the wiper blade (10) has an ageing indicator element (21) for the wiper blade (10), said ageing element being covered by a protective element (25), wherein the protective element (25) is constructed such that, and/or is arranged on the wiper blade (10) such that a mounting of the wiper blade (10) on the wiper arm (2) is only possible after a removal of the protective element (25) from the ageing indicator element (21).