Some simple maintenance can help you to prevent dangerous gas leaks.
A gas hose is a perishable item, and becomes dry and brittle after it has been used for a while. If the hose cracks, gas leaks out, which can cause an explosion hazard. Gas hoses should be replaced after 2–5 years. Exposure to sunlight and extreme temperature variations are among the conditions that affect the lifespan of a hose. Regularly check the hose for leaks, so you're always certain that it's intact before you start to use the appliance.
Make sure the regulator is seated correctly and has been tightly fitted to the gas bottle before you open the valve. How to replace and install the gas bottle on your barbecue.