The top of the fridge is greasy and I have no idea how.

How to say “The top of the fridge is greasy and I have no idea how.” in Japanese

In Japanese

冷蔵庫(れいぞうこ)の上(うえ)がなぜかぎとぎとなんだけど、どうしたらこうなるの？

Reizōko no ue ga nazeka gitogito na n da kedo, dō shitara kō naru no?

The top of the fridge is greasy and I have no idea how. in other languages