Storing dry/wet mixtures

Recently I have switched my three cats to Nutro and I am extremely happy with the results. I have been giving them a mixture of dry and wet food together with a teaspoon of water. They never finish the entire bowl so I have been covering them with wrap and putting them in the fridge. The next feeding I add another teaspoon of hot water, stir and let them have at it. They have been loving it, but I'm not sure if I'm storing the food correctly.

Is there a certain way, or is what I'm doing fine?

Thanks in advance!

I wouldn't store a mixture at all. You can store wet food by itself in the manner you mentioned. I would suggest feeding a smaller amount and giving them a bit more if they are looking for more food once they're finished.