An eraser collector with over 2,000 erasers in his collection lovingly documents his rubbery pals on this page:
To prevent the erasers from hardening, I soak them in warm water mixed with dish washing detergent (once a year). Then I towel dry them and soak them in Armor-All and towel dry them again. This product is normally used to keep tires and dashboards from dry rotting in the sun but it's excellent for erasers too!
(Thanks, Matt!)
