The gas tube must be checked regularly for wear or leaks. It must be replaced every two years. If it is damaged or if you notice a leak, the gas tube should be replaced immediately.You must regularly check the gas tube for cracks or any other defect, thoroughly, Remember NOT to check gas leaks with a flame. Keep the tube away from heat.Keep the burners clean at all times to make sure gas consumption is optimum. To clean the burner holes use a wire brush, If you clean the burners with water make sure that you dry them properly.