If your Haier microwave is sparking inside, stop using it straight away. This is usually caused by metal inside the oven, burnt food or grease buildup, or a damaged waveguide cover (mica plate) on the inner wall. Remove any metal items, clean the interior thoroughly, and check the mica cover — if it’s burnt or cracked, it needs replacing. If sparking continues after cleaning, the microwave should be professionally repaired or replaced for safety. For general safety and appliance maintenance guidance, see a user manual example here:
https://manualslibraryy.com/bissell-35799-proheat-2x-revolution-pet-upright-carpet-cleaner-manual/
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December 2025
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