I have been making sponge cakes for over 20 years. They've usually turned out okay. However, since moving into this house I can't seem to get the cakes to rise at all. They taste okay, but they cook very quickly in the oven-supplied-in-the-house. Would a too hot oven be responsible for the sponge not rising? Is the mixture setting before it gets a chance to expand? This is today's theory, and I wondered what you thought...