Big problem with SMEG cooker. Inner lining has split along bottom. It's only 5 years old but SMEG seem to think I should pay half towards a new one!! Has anyone else had similar problem. It's odd that SMEG should offer anything if they think it's not a manufacturing fault but the SMEG recommended engineer politely informed us that the GAS inlet pipe was at risk of combustion due to the external heat venting. HELP!!