How Well Do Mushrooms Keep?

[EternalOptimist7]

I have a sealed pack of sliced mushrooms which have a use by date of Jan 30th. They look ok, not slimy etc, but of course I haven’t smelt them as they sealed. DH is making omelettes tonight. Will the mushrooms be ok to use in them?

They are sealed that should be!

Use until slimy. They keep better if you open the pack, and still better in a paper bag.