I am not aware of any specific advertisement by Hoover promoting the use of ketchup for cleaning microwaves. It's possible that this advertisement was released after i lost interest in that topic or was limited to a specific region.
Cleaning a microwave with ketchup does not seem like a standard or recommended method. Typically, microwaves can be cleaned effectively with a few common household items and some water. Here's a simple and safe way to clean a microwave:
Fill a microwave-safe bowl with water: Take a microwave-safe bowl and fill it with water. You can also add a few tablespoons of vinegar or lemon juice for additional cleaning power and a fresh scent.
Microwave the bowl: Place the bowl in the microwave and heat it on high power for several minutes until the water boils and creates steam.
Let the steam work its magic: Allow the steam to build up inside the microwave for a few minutes. The steam will help loosen the dried-on food and stains on the walls and ceiling of the microwave.
Carefully remove the bowl: Use oven mitts or a towel to carefully remove the hot bowl from the microwave.
Wipe the microwave clean: Take a clean microfiber cloth or sponge and wipe down the interior surfaces of the microwave. The steam should have loosened the grime, making it easier to clean.
Pay attention to the turntable and door: Remove the turntable and wash it with warm, soapy water. Don't forget to clean the microwave door both inside and out.
Regarding using a vacuum cleaner for cleaning microwaves, traditional vacuum cleaners are not suitable for this task. Vacuum cleaners are designed to collect dry debris and are not equipped to handle wet or liquid substances like water or ketchup. Attempting to vacuum up liquids can damage the vacuum and pose safety risks.
To summarize, the use of ketchup for cleaning a microwave is not a standard method and is not recommended. Stick to more conventional and safe methods like steam cleaning with water or using appropriate microwave-safe cleaning products. If you're uncertain about a specific cleaning method or product, it's best to refer to the manufacturer's guidelines or consult with a cleaning expert.