I've never kept a cleaner wrasse( except a sick one ,kept for a friend to treat it. It died) ,so I have no longterm first hand experience with them. However,
Scott W. Michael presents these assesments in his book "Marine Fishes":
Blue streak Cleaner wrasse (Valenciennes):
" Difficult to feed. May accept meaty foods...
An occasional specimen will nip and irritate teh mantles of tridacnid clams...In general, most aquarists are well advised to avoid cleaner wrasses....they have low survivl rates in captivity..."
Red Sea Cleaner wrasse: (Larabicus quadrilineatus) :
"... typically defies the best husbandry efforts of aqaurists...Adults will eat small-polyed stony corals;young are not destructive..."
There are a number of other species ; it would be helpful to know which one you have, but in general as a group they fare poorly in captivity; I suspect some worse than others.
I have kept cleaner shrimp ,skunks(lystmata ambionenesis) and bloods( lystmata debelius) before I kept some of the wrasses and other fish that like to rear em up. Neither did any good for ich control back then. While they engage in grooming behavior ,there are studies out there that show they don't eat ich( crtocaryon irritans. Some suggest they may irritate the fish by picking at ich caused exit wound. The bloods also eat coral polyps from time to time and the skunks can irritate coral as they pick food from them. Both are cool and colorful though;I'd keep them in the right aquarium for the interesting behavior and color if they lived a little longer than the average 2 year lifespan.