What is the best technique for using a hinge mortising router bit to create precise and clean mortises for door hinges?

The best technique for using a hinge mortising router bit to create precise and clean mortises for door hinges is to carefully measure and mark the location of the mortise on the door, secure the door in place, adjust the depth of the router bit to match the hinge thickness, and make multiple shallow passes to gradually cut out the mortise. Be sure to work slowly and steadily to avoid splintering or chipping the wood.