Bissell proheat advanced 1846?

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/

Tech pro
December 2025