Its not that difficult to jungle lee sin how are you struggling? If you are close enough to the target to land E>W(behind)>Auto>Q>Auto>R(If you have)>Q.

watch vvvrotic steam for best ap lee song mechanics.

OK 1st thing 1st with lee sin you've got to learn how to build.(check mobafire,lolpro etc).Get a sighstone for them clutch w escapes and epic enemy jungle warding.Buy a vision ward and put it in the enemy team jungle in a bush where they might no pass often but gives great vision.Don't be afraid to dive. Remember lee sin's AA help with dmg so dont forget to aa after each skill.Dont always follow the same skil build.Sometimes you might need to max w before e etc etc. Learn to R/flash insec style.

Watching streams helps.

[quote=iJoonyah]You must tap Q again once you land it.

No.
Matter.
What.[/quote]

My hearts telling me no..
But my body.. but my body is telling me YES

anyhow, I would say that Lee Sin is early game, than late game. Build the ice smite thing, then build into the damage enchantment. (Sorry don't know names) If you're ahead build last whisperer, if not go for tanky based off the enemy team. If you're farm heavy instead of gank, get hydra instead of LW.
Always get a sightstone. You can sell it later for a better item. Get yellow trinket of course.

When stealing baron or dragon,
I was gonna continue but I g2g. MAybe i'll continue later. GL! <3

You must tap Q again once you land it.

No.
Matter.
What.

gromp -> blue -> red -> gank once or go back