How to say “My grandma pours boiling water down the floor drain once a week and swears by it.” in Japanese
In Japanese
うちのおばあちゃんは週に一回、排水溝に熱湯を注いでて、これが一番効くって言い張ってるの。
Uchi no obāchan wa shū ni ikkai, haisuikō ni nettō o sosoidete, kore ga ichiban kiku tte iihatteru no.