We sell a spray cleaner and microfiber cloth ($20) that works extremely well to clean felt. This cleaner attracts dust and dirt and will not only make your felt look new but will also prolong its life. Otherwise, we recommend brushing the felt in one direction. I usually tell folks to brush from the head of the table to the foot (direction of break). Vacuums are not recommended, though a lint roller can work well to clean darker felts.