I have a habit of not closing the refrigerator.
Why don't you close the fridge?
I'm too lazy to do it after I forget.
That sounds like an easy habit to break. You should close the refrigerator because food can spoil if you don't.
I don't care enough.
That sounds really immature and will mostly likely upset others. You're wasting food by doing that. Do you really want the food that you or others buy to spoil?