I have a couple of fish that seem to want to be cleaned by my cleaner shrimp, show up where the two of them hang out and flash for them. the cleaner shrimp don't care to clean them or anything. this has been going on for a few months, and I haven't found ich, or disease on the fish, I think it's just part of them to want to get cleaned. Should I look at getting a cleaner wrasse/neon goby to try and clean them instead? or just leave them alone since everything looks fine? or any other suggestions?