Manroland 202 Delivery Pile Sensor Light On - pile does not go down automatically

My delivery pile sensor light is on normally, but pile does not go down automatically. Need to push down button every once in a while.

Before problem had dampener tray overflow and got sensor wet.

Since this happend Saturday. Assume that the sensor may still be damp.

 

cuold be damp try alittle electronic cleaner or compressed air