Short and sweet: The Snoopy Grilled Cheese Maker is a piece of junk. Unless you want grilled cheese sandwiches that are as thin as dimes and hard as them, too.
Even using cruddy, soft white bread and one slice of cheese yields something too thick to close the thing without squashing the sandwich into a wafer. I have had to revert to thin-sliced rye and thin-sliced cheese, which results in something akin to a large cheese cracker.
This is Smart Planet model SGCM1. Avoid it like the plague. I bought it at Grocery Outlet for $15.
It will be unloaded at my next garage sale.