To clean your under-cabinet lighting fixtures, first, ensure that the fixtures are turned off and unplugged for safety. Gently remove any dust or debris using a soft cloth or a duster. For more stubborn dirt, dampen the cloth slightly with water or a gentle cleaning solution. Avoid using abrasive materials or harsh chemicals that could damage the fixtures' surfaces. Carefully wipe down the fixtures, focusing on the areas that accumulate the most grime. Once cleaned, let the fixtures air dry completely before plugging them back in and turning them on. Regular maintenance will help keep your kitchen under cabinet lighting fixtures looking their best and functioning optimally.