I've sort of given up on using one of these. It seems like everything I try goes wrong. I've tried to make hamburgers 6 times, each time I left it on too long. Finally I got the timing right, but the ground beef managed to push its way into the grooves and blocked the fat from flowing out. I got sick trying to eat it. I tried putting mixed frozen vegetables on it, and when I opened the top they stuck to it, and then fell off between the counter and stove. I went into a crash just trying to deal with this. Although the grilled vegetables did taste great. Have any of you had luck with one of these devices? I'm just about ready to give mine away.