Banned Sock Puppet
This is the way I do it. One drop per roller. Then wipe the outside clean as I run the pedals backwards. Clean when I start ride after lubing, it's always kinda gunky after the first ride. So I wipe the chain again with a WD-40 soaked rag (Mike T.'s method), then give it another clean dry rag wipe. Now it's good until the next lube - 500 miles or until caught in the rain, whichever comes first.1 drop per roller, no 'stream'. For whatever reason I do this on the bottom run of chain, not on the cassette.