Microwave makes crackling, popping, or sparking noises inside the cavity during use.

Safety first: Stop the microwave immediately and unplug it if you see sparks.

• 1. Remove metal objects: Ensure no metal utensils, twist ties, or foil are inside. Use only microwave-safe containers.
• 2. Clean the cavity: Once cool, wipe the interior with a mild detergent solution. Pay special attention to corners and around the waveguide cover (usually a rectangular panel on the side wall).
• 3. Inspect waveguide cover: If the mica cover is burnt, cracked, or has holes, it must be replaced. Do not operate the microwave without this cover.
• 4. Replace cover: Fit a new Beko-compatible waveguide cover, cutting to size if supplied as a sheet, and secure it as originally.

Note: Persistent arcing after cleaning and cover replacement may indicate deeper cavity or magnetron issues requiring professional service.