The easiest way to tell if Alfredo Sauce has gone bad is to just smell it because when the Alfredo Sauce has gone bad it will have a really sour smelling smell to it.
One whiff of the sour smelling Alfredo Sauce will tell you and you will want to snap your head back.
When Alfredo Sauce has gone bad or is going bad the Alfredo Sauce will typically have a sour smell to it.
Also look for any mold growth in the Alfredo Sauce and if there's mold then it's bad.
Or if the Alfredo Sauce does not smell bad or does not have mold in the sauce then taste it and if it has a sour taste to it then throw it out because it has gone bad.
Alfredo Sauce once opened will last for around 2 weeks usually in the refrigerator before it goes bad.
The easiest way to tell if Alfredo Sauce has gone bad is to just smell it because when the Alfredo Sauce has gone bad it will have a really sour smelling smell to it.
One whiff of the sour smelling Alfredo Sauce will tell you and you will want to snap your head back.