Hayate cannot bring himself to return to the Sanzenin mansion after he damages the cashmere coat that Maria lent him. While contemplating on what to do, he meets the "generous" people who tried to take him away and ends up fighting them all!
Why? Because detergent 
is neither food nor drink.
Porque el detergente no se come ni se bebe.
Detergente não é algo comestível, 
muito menos uma bebida.