Sportsman 550 2014 power steering

Having trouble losing power steering when I go through a lot of water or even just washing my bake after riding. Just got back from Hatfield McCoy trails and happen again. Seems like when bike sits for a while and drys out it always come back when i talked to dealer they say there are no issues with Power Steering does many know what might be happening I know it is electronic and don’t think there is and fluids involved. NEED HELP