For cleaning incense resin burner sieves: After burning of incense and resins, the sieve will get dirty and the gaps could be clogged by the resin. Hold the sieve, using the tongs, close above a flame, in order to carbonize the remaining resin. Brush clean afterwards.
Tip for burning incense: Always sprinkle some woody incense first on the sieve, before using the resin. This will prevent the sieve to be clogged immediately. It is recommended to buy some extra sieves, so you will get along for a while before needing to cleanse the sieves.