Kontrol Tower spins or is stuck

The Kontrol Tower spins, falls off or sticks

• Spins or falls off: the mesh gasket under it is thin or worn. Pinch it wider, or fit 9004200035 (Kamado Joe Europe).
• Stuck: grease and soot after long cooks. Wash it with soapy water (Kamado Joe); owners of other kamados free it while warm and never force it cold.