"I'm getting quite close, but I'm not there yet," the Sydney FC striker and Austria captain told The World Game.
"Every now and then I'm missing some chances where I think normally I should make them, so I'm very critical on myself. I'm never happy after a game, so I always try to find things I can improve.
"Sometimes as a striker you have these kind of runs where you can't explain why it's going so well, but I think it's a make-up to my first half of the season where I hit six or seven times the post, so it's all equal at the end."
Janko came up with his two goals in the 4-3 win over Western Sydney Wanderers despite injuring his hamstring in the on-field warm-up.
"I felt it when I took a practice shot with the right foot," he said. "It wasn't bad enough that I couldn't play, but it tightened up a bit more the longer the game went on, so we decided to take no risks and it was a precaution to get out.
"It was best to take off and get fit for next week."
Janko left the field in the 65th minute, with the game level at 3-3. Terry Antonis scored the winner 10 minutes later.
After entering round 19 as the equal-leading scorer with Wellington Phoenix's Nathan Burns on 10 goals, Janko exited the round alone on top - his double trumping the single goal Burns scored in the 3-2 win over Melbourne Victory on Sunday.
Janko was unlucky not to get a hat-trick against Wanderers. It was his header that led to the opening goal of the match when the ball crashed into the crossbar and upright before coming down and hitting goalkeeper Ante Covic on the shoulder and going in.
The buoyant big man reckons he is still owed a goal from the night his booming, volleyed shot that went in against Newcastle in Wollongong on 3 January was disallowed when he was controversially ruled offside.
"Well, for me it was a header goal against Wanderers because they disallowed the goal against Newcastle, so it should be a hat-trick," Janko said.
"But the only important thing at the end is it's a win or a draw and we got the win, so I was very happy with the team effort."
Perhaps the most impressive thing about Janko is his calmness when in finishing mode. He rarely misses the chances he should put away.
When The World Game suggested to him that to try to remain calm in such situations was one of the most important things a striker can learn, he replied: "It's not easy to put the ball away every time, but of course you can't buy experience. I think that's the main thing.
"We have fantastic young players in our squad, so they can only become better and the sky's the limit for them, so I try to be a role model every now and then, especially now when I'm not quite at my peak but I'm close.
"It's easier if you're not struggling with yourself and your own performance to lift them also. I'm trying my best to do that and maybe they can get something out of my way of going about things.
"Staying calm when you're trying to finish takes years of practice and I'm a striker since I was six years-old, so it's all about repetition and it's all about practising and this is the key to it."
Janko said it wasn't a priority for him to keep checking the goal-scoring list and that if he did finish on top it was an honour he would enjoy once the season was over.
He said team ambitions were much more important while the season was still in progress.
"I look at it at the end of the season," he said. "I mean, if you look at the Perth away game (on 7 February) I gave one penalty to Milos (Dimitrijevic) because to me at that moment I chose team spirit over personal goals.
"I think, for me, it's always more important that the team is having a good time and having a good balance and when one teammate is coming to me and saying he would like to take a penalty when I'm sure he would make it, then I will always go for the team spirit."
Sydney FC was awarded two penalties in that game, with Janko the player fouled both times. He slotted the first one away and Dimitrijevic the second in what ended up a 3-1 win to Sydney.
