We own a 2012 Winnebago Sightseer 33c. There is water leaking down on the front step from below the floor. I have attached a picture, the red circle is where the water is coming out below the silver metal piece and the arrows show where it runs down and ends up. I have removed the carpet from this area as it was getting wet. I have checked below all sinks and the shower and everything is dry on that level. I have narrowed it down to water draining to the gray tank or from the gray tank because when we run our portable clothes washer, I run a hose through the window directly to the washing machine so no interior water supply is being used and it still leaks after the water drains into the shower. It also leaks after we shower. My real question is how do I access this area? I know there is an access on the other side inside of a bay that shows the gray tank but the view is limited and I cannot see the other side by the stairs. I am feeling that the floor is getting soft in this area. Is there a way to access the area without cutting into the floor or do I need to do that? Thanks for any helpful advice.