It could be that the wick is too short, so the melted wax is extinguishing the flame.
Step 1. Trim the wick to 1/4” tall to remove any burnt parts with scissors or a wick trimmer.
Step 2. Remove more of the wax around the wick base- you can use a hairdryer and a paper towel to soak up the melted wax.
Step 3. Ensure you let the wax pool reach the side of the tin, to create an even burn and prevent tunnelling.
