So, the time traveler left you with a surprise, when he got away from the toilet.

Yeah, there is a leak somewhere.

If you go to the pie vending machine and out to the trash bin you can see the leaking pipe.

You get there through the dark room

Now, fix the leak.

The cork in the tarantula jar is of perfect size.

Go flush the toilet. It works now. You find something nice and blue from the toilet bowl (this game sometimes, yuck!).