If you're gonna leash with some form of damage over time (ex: twitch poison, singed poison)...
please do NOT stay until the buff is, like, really low health or use that d.o.t when it is. I prefer not smiting on my first clear. Try to leash and back of early, or stop using the d.o.t. the closer the buff gets to lower health if possible (ex: singed q) (also if ur teemo try not starting E to leash)
But that's just my opinion, and if you accidentally steal it try to help them at least a little bit clearing one camp, as they will be a bit behind.