also posted in 0-3m board...I figured I'd post here because you have maybe dealt with this situation.
After DD's 5am feeding this morning, I never replaced the lid to her powdered formula. Upon waking at 9am I discovered this, immediately scooped off the top layer, and covered it. I fed her from a new can of formula. Is it ok to use the other one? Have you ever? My house is air conditioned so it is cool and dry.
Re: Left lid off formula can
Unless you have some odd bug infestation in your house or a rodent population on your counters, you are just fine.
I promise.
There was a time a few months in I was so stressed and tired I'm pretty sure the lid never made it back on the formula can until the end of the day.
I mean think about, what really is going to happen to it? If you at all trust your housekeeping skills it's fine.