Part 2 Cleaning the Block
Scrub outside. Use hot soapy water to scrub the outside of the block. Don't forget to figure out the bottom because it can increase bacteria. You may need to scrub harder to remove any grease or sticky spots
Wash in the slot. For this part, you need a slender brush. Baby pacifier nipple brush works, but you can also try pipe cleaners. Use it to scrub in the sipe, as deep as possible into there.
Rinse clean. From the inside, flush the block with warm water to wash soap. Move to the outside and make sure to thoroughly rinse all sides of the block with water. You may need to rub your hands to make sure the soap disappears