Hi guys ive bought the UK version KL Night Eagle, very pleased however one small fault cropped up yesterday, warning message chucked up 'Rain Sensor fail',so i checked with the garden hosepipe and it works fine and if i turn the hosepipe on full the wiper speed increases as it should, so i can only guess its a false warning, any ideas? can i reset the computer by disconecting the battery terminals? if so which one do i remove neg or pos or both,dont want to damage anything, thanks in advance

Update,took off negative cable for 30 minutes re connected and fault cleared not come back,should it happen again maybe sensor will need a wipe