Gas hob burners can get messy, and certainly need maintenance to work perfectly. The proper way to do this is to break the gas hob down into parts. Here is a quick cleaning guide:
1. Ensure that the hob is cool and not hot to the touch before doing any of the cleaning
2. Hand wash the trivets in warm, soapy water using a non-abrasive sponge or cloth.
3. Allow the trivets to soak in warm, soapy water for 20 minutes
4. The burner caps and heads should also be hand-washed and soaked, similarly to get rid of any tough stains.
5. Then, dry all parts immediately and place back onto the hob.