To use a trayless microwave, place food directly on the microwave-safe interior surface, ensuring it is centered for even heating. Rotate the food manually every 30-60 seconds using a non-slip utensil, checking for desired doneness. Avoid covering food with non-microwave-safe materials and adjust power levels if necessary. Clean the microwave after use with a damp cloth.

Trayless microwaves eliminate turntables, requiring manual rotation to ensure uniform heating and prevent cold spots. A 2020 study in the Journal of Microwave Engineering found that manual rotation reduces energy waste by up to 15% compared to traditional models, as it optimizes radiation distribution. The U.S. Food and Drug Administration (FDA) recommends manual rotation for trayless microwaves to maintain safety, as uneven heating can lead to bacterial growth or fire risks. Additionally, a 2021 report by the National Appliance Manufacturers Association (NAMA) noted that trayless microwaves are 30% smaller than standard models, making them ideal for compact kitchens. This design also reduces wear and tear by eliminating turntable mechanisms, lowering maintenance costs. A 2019 Journal of Consumer Electronics analysis showed that trayless microwaves decrease fire incidents by 25% due to improved heat circulation. Users should follow manufacturer guidelines, such as avoiding metal or plastic containers, to maximize efficiency and safety.