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Curious Inventor - Store: Dry Tip Cleaner
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out of stock, check back in 3-4 days - price: $10.99
Dry Tip Cleaner
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short description:

A sponge replacement, these soft, metal coils are coated with flux and clean soldering iron tips without thermally shocking them like a wet sponge does. This helps to prolong tip life. Also, in our opinion this cleans more effectively than a sponge.

more information and instructions:

To clean, thrust the iron into the coils a few times. Don't scrape the tip on the coils because this can fling molten solder.