2009 Mazda RX-8 Owner's Manual - Page 200

Driving Your Mazda Switches and Controls AUTO (Auto-wiper control) When the wiper lever is in the AUTO position, the rain sensor senses the amount of rainfall on the windshield and turns the wiper on or off automatically (off―intermittent―low speed―high speed). The sensitivity of the rain sensor can be adjusted by turning the switch on the wiper lever. From the center position (normal), turn the switch towards (+) for higher sensitivity (faster response) or turn the switch towards (_) for less sensitivity (slower response). Switch Less sensitivity CAUTION Ø Do not shade the rain sensor by adhering a sticker or a label on the windshield. Otherwise the rain sensor will not operate correctly. Rain sensor Center position Higher sensitivity 5-62