Nope, you're doing everything fine, he's just tired from a long day, no worries there. You might want to snuggle him if he's getting droopy & he really needs baths daily, that also might be why he's drooping. Do you have a rubbermaid container you can put in the tub and fill that with warm water for him? I use the kitchen sink, Gina uses the bathroom sink, but you said that's not fair to the rest of your family. So try that. Any type of container will do, he doesn't need to swim, he just needs to soak.