Router bits can be cleaned at home to an extent. After five or six repetitions of honing, a router bit requires professional grinding to maintain its sharpness. The tests that follow will tell you whether that time has arrived.
Examine the bit in bright sunlight. Look at the cutting edge for any nicks or dull places.
Place a fingernail against the cutting edge of the bit and gradually spin the bit to the right. It should be able to shave the nail with only a small amount of effort.
Run the bit into softwood and see how it cuts, as well as the surface it leaves behind after it is finished.
Double-check the chips. If the shavings resemble sawdust rather than thin shavings, the bit will require professional attention.