The Boeing company has researched and produces THE BEST cleaning chemical solutions that money can buy!Router bits get coated with a burnt on crust that insulates them, causing excessive heating which if not cleaned, will cause you bit to dull, prematurely!Spitz a small amount of Boeshiled cleaner onto your router bit and let it soak for a few minutes and that baked on crud simply wipes off with a rag.Cleaned, your bits will be sharper, longer and you routes will be much cleaner with less chip out!