Disassemble your lamp completely, removing any bits of used carbide. Rinse the lamp assembly with distilled water or clean tap water to remove any debris.
Isolate the burner tip from the lamp and visually inspect it for blockages.
Remove any blockages with a special tip reamer made for cleaning carbide lamps. If you do not have one available, you can use a soft wire brush that is the appropriate size.
Scrub all parts of the lamp under warm running water with a toothbrush to remove any built-up soot inside the lamp.
Rinse and scrub the retainer and filter plate with the toothbrush.
Inspect the drip mechanism, gas tube and inside threads to make sure there are no lime deposits. If there are, scrub the area with a 50:50 mixture of water and white vinegar. Rinse the items again with warm water.
Place the parts of the lamp on a clean towel to air dry. Reassemble the lamp once it has fully dried.