Mistral Pizza Maker MPM10

Im reluctant to use it again – The first time I used it, it was great but the 2nd time, the pizza top cooked and the base remained uncooked and stuck to the stone. The steam that came out when the lid was opened was so intense that we ended up using a tool to open it so we didnt get burnt. I couldnt get the pizza off the stone. I think the button that switches the oven off when the lid opens was burnt and therefore no longer cut the oven off. I dont like to bag the product. Maybe I did something wrong but it seems like a danger to me. Id rather use my good old range, it cooks the pizza just as well and without putting my life at risk. The concept!