How to clean a spirit burner when food has being spilt over it such that the holes are partly clogged?
Use steel wire, a thick needle or something similar and try to clean the holes. Steel wool can be used to clean the burner. Try not to get food into the wick. After cleaning the burner, let it dry properly before use. It is advisable to test the burner after it has dried before it is used in the stove again, to make sure it works properly.