This applies to the Stagg EKG and Stagg Stovetop kettles with wooden handles & lids - both maple & walnut.
Because wood is a natural product it is prone to drying out and warping. Wood components that are exposed to high heat and steam like the lid pull and handle can eventually crack or dry out (like repeatedly putting a cutting board in a dishwasher).
To prevent this, we recommend periodically applying mineral oil to the lid pull & handle once per month - and buffing with a soft cloth. It’s also good practice to do this any time you notice the wood feeling especially dry.