YOU SAID:

Eww, who forgot to flush the toilet?

INTO JAPANESE

えー、トイレの水洗を忘れたのは誰？

BACK INTO ENGLISH

Well, who forgot to wash the toilet?

INTO JAPANESE

さて、誰がトイレを洗うのを忘れましたか？

BACK INTO ENGLISH

Well, who forgot to wash the toilet?