Hints for late-game crafting materials? (spoilers)

[Frank]

Does anybody have any hints/tips for how to find the materials for crafting the clock? I found the blueprint and the reward for defeating the crab boss on my own, but I've gone back through almost the whole map and not found the other three.

I know there's a guide with explicit instructions for finding the pieces, but I'm hoping someone has some hints instead, like any NPCs to talk to or clues hidden in the environment?

[Pleont]

Unfortunately, there doesn't appear to be any NPCs that comment on the clock material locations, nor anything that would guide you to the pieces like with the key to the first boss. To make matters worse, the other three pieces aren't hidden in such a way other items are hidden where there is a visual hint there is a secret passage in the wall.

As far as I can tell, the only hint to the existence of these clock pieces is the blueprint, and the knowledge the other pieces, aside from the reward from the crab, exist somewhere. However, once you discover one of these three, you will know what you need to do to find the other two.

Hint A:
They're all hidden in unmarked rooms in the map accessible through a secret passageway. Yes, you need to wall-hug the entirety of the game map. Have fun!
Hint B:
You need to be able to traverse liquids to reach the areas with the secret passageways.
Hint C:
Gardens, Aquarium, and Factory.
Hint D:
Watch a video guide; your time is more precious than wall-hugging an entire game map.

[Frank]

That's a bit disappointing, but thanks for letting me know! I guess I'll just follow the guide.