i hand feed my cleaner shrimp about once a week. just a small chunk of whatever im feeding(formula 1, prime reef, etc. i lost a cleaner shrimp before that, not sure if not feeding was the cause, but he didnt get much because i had no fish food waste either.
this ones been allive for 7-8 months now, so far so good.
doesnt take much coaxing, stick my hand in the tank for about 15 seconds, and he finds his dinner rather quickly.