I have purchased a Yosukata carbon steel wok and tried to season it according to manufacturer's instructions but have run into a problem. The instructions imply a gas burner, but I have a ceramic stovetop. What happens is that the bottom of the wok rapidly achieves 240°C or more, whereas the wall remains somewhere between 60-70°C, due to the poor thermal conductivity of carbon steel. As a result, only the bottom gets seasoned, not the wall. I'm considering buying a convection hob, but am not sure this will solve the problem.