There are a few things you can do to clean egg crate foam if it becomes dirty or smelly.

  1. Use a vacuum cleaner to suck the dirt and dust out of the crate.
  2. Use a plunger to suction onto the top of the crate and push and pull until all the dirt and dust has been removed.
  3. Rinse off the crate with water and soap, then dry it off with a cloth or paper towel.