1. Please try to burn off the concentrate residue. Just repeatedly heating the Yocan Regen atomizer and lightly blowing on the quartz coil.
2. Use a q-tip to clean the walls of the heating chamber and the heating element.
3. And you also can hit the fire button to keep the chamber warm when you clean it with a q-tip.
If the coils are not hot, the walls will be sticky, thus, making it difficult to clean.