These muffins are still moist; how did you store them?

How to say “These muffins are still moist; how did you store them?” in Japanese

In Japanese

このマフィン、まだしっとりしてる。どうやって保存(ほぞん)したの？

Kono mafin, mada shittori shiteru. Dō yatte hozon shita no?

These muffins are still moist; how did you store them? in other languages