This discussion may contain spoilers!
This is a thread devoted to every time any one of us has gone in the wrong direction for a puzzle solution, only to realize our mistake after checking a walkthrough or sleeping on it. Just remember to be specific about which games these puzzles are from, and feel free to hide what you like in a spoiler tag. I'll start.
Moai Better Blues
I didn't heat up Glen Miller's teapot, because I thought the Wind Moai
was supposed to provide the train whistle.
I didn't use the red slime snail on Stinky's gong, because I was trying
to put it in Mr. Spatula's washing machine to shake off the ear-shaped
They Stole Max's Brain
I didn't use the audio tour on Sal, because I thought T. Palinus was what got rubbed on the Gorilla's face in the vision of the future.
I didn't have Credit Card Max attack the pyramid of corndogs, because I thought I had to swap him out with Frankie's card.