There could be several reasons why your toaster isn't clean even after running it through the dishwasher:
Food debris stuck in crevices: Toaster crumb trays and slots can have small crevices where food particles can get trapped. The dishwasher's water jets might not be powerful enough to dislodge these particles. Try using a small brush or a toothbrush to clean those hard-to-reach areas before running it in the dishwasher again.
Dishwasher temperature: Some toasters may have parts or components that are not dishwasher-safe. High dishwasher temperatures could cause damage or warping to these parts, which may make it harder to clean the toaster effectively. Always check the toaster's user manual to ensure which parts are dishwasher-safe.
Dishwasher detergent: If the dishwasher detergent isn't strong enough or doesn't have enzymes to break down grease and grime, it may not effectively clean the toaster. Consider using a more powerful dishwasher detergent or adding some baking soda to the dishwasher for an extra cleaning boost.
Rust or stubborn stains: If the toaster has rust spots or stubborn stains, the dishwasher might not be able to remove them completely. In such cases, you may need to use a specialized cleaner or a paste of baking soda and water to tackle those stains.
Overcrowding in the dishwasher: If the toaster is placed too close to other dishes or utensils in the dishwasher, the water and detergent might not be able to reach all parts of the toaster effectively. Make sure the toaster has enough space around it for the water to reach and clean it properly.
Old or damaged toaster: If the toaster is very old or damaged, it might have accumulated grime or debris over time that's difficult to remove. In such cases, a dishwasher may not be enough, and you might need to clean it manually or consider replacing it.
In general, while some parts of a toaster can be dishwasher-safe and easily cleaned using this method, certain areas may require manual cleaning or more specific cleaning solutions. Always refer to the toaster's user manual for cleaning instructions and make sure to unplug the toaster and let it cool completely before attempting to clean it.