I can not get the unit out from the counter. I took the mounting screws out and it stated to come out, but now the water connections are what I think, holding it. I need to see what that looks like to know how to get to it. Also, It leaks water and I beleive it is the door. but I can't be sure until I pull it all the way out. How much is a new door gasket and how do you install it?