There are varioius brands of spray cleaners for removing the gum and crud from saw blades that work well on router bits. Just spray it on and let it set and with a tooth brush give it a quick scrubbing. There are also lubes for the bearings. Wipe the bearing clean with a q-tip and with the bit standing up put a couple of drops on the top and let it soak in. As soon as a bit starts to dull send it out to be sharpened. The folks that make Forrest Saw Blades have a great sharpening service.