Nah, not slackers, just retrained. Once they see food entering a system regularly and scheduled, they become very knowledgable to this fact and will wait for some nasty fish food instead of some nasty parasite. You also have to take into account that we as reefkeepers do eveything in our power to keep our tank parasite free, so there is usually not much on a fish to clean.
UV sterilizer, cleaner gobies, shrimp, wrasses, etc will not cure ich. Ich will live in your tank for weeks even without a host. If there is any fish in there(including a goby) you will never rid yourself of it. It may look like it is getting better or going away, but wait until a small temp swing or something of the sort and you will see it flourish. You can bring ich on with anything, including the lr or the sand, so qt anything before putting it in. Heck, ich can come in on a cleaner goby(go figure). The only way to rid the tank of it(without killing coral) is a qt of all fish in the tank for upwards of 6-8 weeks. They will need to be treated(hyposalinity, copper, etc.) in the separate qt to rid your tank of ich. It sucks, but once you do it, it will be gone, as long as you qt things as they come in. Trust me, I'm not one for all the formalities, I do not practice what I preach, but I do know the steps to rid yourself of bad parasites.
