What should be used to wipe the inlet Ice Detector Sensor?

Using a lint-free cloth saturated with ethanol is the appropriate method for wiping the inlet Ice Detector Sensor because it effectively cleans without leaving behind fibers or residue that could interfere with sensor functionality. Ethanol is a suitable cleaning agent as it evaporates quickly, reducing the risk of moisture accumulation that could affect the sensor's operation.

In contrast, the other options may not be suitable for several reasons: a paper towel soaked in water could introduce moisture to the sensor, putting it at risk for malfunction. An oil-saturated rag could leave behind a residue that might also interfere with the sensor’s performance. A standard cotton cloth may shed fibers, which can obstruct the sensor's function and lead to false readings. Therefore, the choice of a lint-free cloth with ethanol ensures a proper clean that maintains the integrity and accuracy of the inlet Ice Detector Sensor.