Microwave cavity shows rust spots, especially around the door frame or floor.

Safety first: Unplug the microwave before performing repairs inside the cavity.

• Step 1 – Clean and dry: Thoroughly clean the cavity and dry it. Remove any loose rust with fine sandpaper.
• Step 2 – Treat rust: Lightly sand rusty areas to bare metal and wipe clean.
• Step 3 – Apply cavity paint: Use microwave-safe cavity touch-up paint to cover exposed metal. Allow to cure fully as per instructions before use.
• Step 4 – Monitor: If rust continues to spread or holes form, the cavity integrity is compromised and the microwave should be replaced for safety.