FarberwareCookstart Aluminum DiamondMax Nonstick Jumbo Cooker Chef's Pan, 6-Quart, Silver

Why is 11 inch pancake griddle NOT easy to clean? Pancake mix sticks to griddle and is very difficult to clean, especially on handle side.

Why does the silver one say 5 liters and not 5 quarts

Can the lids be used on the fry pans?

What is the inside diameter?