Mechanical restraint aids should be cleaned a. once a week. b. after each use. c. when they're dirty. d. if an animal resists its scent.

Mechanical restraints aids should be cleaned After each use.

Each person and every person is different, after using a mechanical restraint aid you always should clean is after each use to prevent different bacteria to each person.

Hope this helped! :D

answer; /// i believe its the cochlea;