Dishwasher vent not opening anymore, how to fix?

[nunmorenegative72]

I have a two year old Frigidaire dishwasher that leaves the dishes very wet after washing. There used to be a tremendous amount of steam coming from vent on door, now there is none throughout the wash and dry cycles. I am using rinse aid and heat dry, still no steam. Does that mean vent is not opening and how would you fix it.