Use natural beeswax furnture polish for springer pellets,Wash them first,then dry them with a hairdryer till they are hot to hold.Then spray the polish onto a cloth and tip in the hot pellets and roll back and forth to coat all the pellets.The washing is the most usefull thing as it removes all the dust and swarf from the pellets,especially if you push them around a shallow container with a paint brush making sure you get them well scrubbed.You will be amazed at how much crud there is in the water when you have removed the pellets.