How to get No Mess Left Behind and No Squint Hint after completing the game?

[chelseacatz6]

After my first playthrough of the game, completing all stars but using the occassional hint, I am wondering what needs to be done to get these two "complete the game without X" achievements. Is it sufficient to start playing level one, then go through the whole lineup without looking at the hints? Or must I reset my whole save file? I'm hoping the former, so that I don't have to complete all the different stars again.

I could not find a clear answer to this in the discussion boards, and I suspect it is a bug currently being worked on by the devs. So I am hoping that whenever there is a definitive answer, it will be added here. Thanks.

[htp34r]

No Mess Left Behind: Reset the whole game, then complete all levels WITHOUT SKIPPING A SINGLE LEVEL! (It's better to complete all levels at once in a row in a linear sequence)
一点不留：重置整个游戏后，不跳过任何一关完成所有关卡！（所有关卡最好一遍过，过完直接下一关）