Granite Laminate Corian Concrete Marble[2] X Research source
Make sure the toothbrush is soft-bristled. This will prevent the counter from becoming scratched.
Avoid using ammonia if you clean other parts of your kitchen with vinegar. This can cause an adverse chemical reaction.
If there is mildew in the cracks of tiles, however, opt for a mildew cleaner. You can buy this at most grocery or department stores.