Put it down on the ground outdoors and leave it. If rest is enough medical treatment, it will recover and fly away. The reason for leaving it outside instead of inside is that it has a better chance of finding food if it does recover enough to fly.

Well done for trying - Moths and Butterflies have very delicate powdery wings and they're easily damaged.

As Mayan said best put him outside.

I'm 15 and I don't really know much about moths besides that they eat clothes lol. But my sink is broken and it leaks DISGUSTING black brown liquid that fills the sink twice a day. It's after 4 a.m. and I just went to get a potato so I washed it and saw a beautiful moth twitching in the disgusting water. I got the moth out with a coffee filter but once it was out it was not responding at all and appeared dead. that's how it still remains at the moment but if you touch it (gently of course) with a piece of coffee filter or toilet paper it will respond trying to fly. I thought at first maybe I should spray it with water with a spray bottle to get that gross "toxic" water off of it but that may do more harm than good so I don't really know if I should or if I should just let it dry. right now I currently have it in my bathroom and there's a heat lamp in there so I turned it on but it doesn't seem like he's just going to get up and fly so I don't know what to do. I know he's really damaged/hurt. What do I do?!