Use a lint-free presoaked IPA wipe, alcohol-free baby wipe, or a cloth sprayed with lubricating spray and rub directly on the rubber roller. As you rub, turn the roller to remove dirt and dust from the entire surface.
How do you resurface rubber?
https://www.youtube.com/watch?v=DwdQFiuGKkQ
How do you make old rubber look new?
https://www.youtube.com/watch?v=rJ1dm_ZdMFU
How do you fix old rubber?
Add a Windex or rubbing alcohol to a cloth or cotton ball. Wipe away the gumminess on the surface of your item. Use a toothbrush to get into those hard to reach crevices. Repeat until the sticky rubber is completely gone.