Master and slave units are provided and each has a one-piece, plural-polarized permanent magnet. A locator is provided for holding the slave unit in position until the master unit can be brought in position opposite the slave unit. The locator is formed of magnetically-attracted material and has a suction cup for temporary mounting on the window. The cleaning material is formed from a layer of absorbent paper having a discontinuous layer of polyethylene thereon. By being discontinuous, portions of the paper are exposed so that it can perform its absorption function. The plastic also reduces the friction between the cleaning material and window, while each magnet has a rubber surface to provide maximum friction between it and the cleaning material. In this manner the cleaning material stays in place without an external fastener.
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