Microwave interior rusting, peeling paint, or exposed metal inside the cavity.

Safety: Exposed metal can lead to arcing. Unplug the microwave and discontinue use if rust is severe or metal is flaking.

Steps:

• Clean and dry: Thoroughly clean the cavity and dry it. Do not scrape aggressively.
• Assess damage: Small chips without rust can sometimes be touched up with microwave-safe cavity paint (follow LG or paint manufacturer instructions).
• Avoid further damage: Use only microwave-safe containers and avoid slamming the glass tray or dishes.

Extensive rust or peeling may compromise safety and usually warrants cavity repair or replacement of the microwave. Consult a technician or LG support.