Any tips on non-dairy milks, especially after opening a sealed carton? This only mentions dairy milk. I've heard oat milk can go 10 days in a fridge after openi

Any tips on non-dairy milks, especially after opening a sealed carton? This only mentions dairy milk. I've heard oat milk can go 10 days in a fridge after opening, but I have no idea how to tell if it's gone bad, and the only advice I get is if it "smells weird", which is useless.