Unplug the microwave or turn off the power.
Mix 1 cup water with 1–2 tablespoons white vinegar or a few tablespoons lemon juice in a microwave-safe bowl.
Place the bowl in the microwave and heat on high for 3–5 minutes, until the interior steams.
Carefully remove the hot bowl.
Wipe the interior surfaces with a damp microfiber cloth or sponge.
Remove loosened food splatters from the ceiling, walls, and door area.
Wipe again with a clean damp cloth to remove any residue.
Dry with a clean towel or microfiber cloth.
For stubborn spots, make a paste of baking soda and a little water, apply briefly, then wipe clean.
Clean the turntable and turntable ring with warm soapy water; dry fully before reinstalling.
For the door and handle, spray a mild cleaner or use a damp cloth, then dry.
Wipe the control panel with a lightly damp cloth only; keep liquid away from buttons and vents.
Remove and clean grease filters if your model has them (follow the manual).
Replace filters, turntable, and ring once everything is dry.
Plug back in or turn the power on.