Every travel insurance policy purchased through Squaremouth comes with our Zero Complaint Guarantee. In the event of a complaint, we will mediate with the insurance provider on your behalf. If the complaint is not resolved to our satisfaction, we will remove the provider from our website.
Manufacturers universally tell you to refrigerate mayonnaise once opened, though, because it helps preserve the flavor. Warmth causes mayonnaise to break down after a while, and it gets to the point where it just tastes oily. Homemade mayonnaise, of course, is a different matter. With its use of raw eggs, it is highly perishable and should be consumed immediately or refrigerated and finished off very shortly.
You will definitely want to pay close attention to the expiration date on your mayonnaise jar so you will know around what time it is no longer acceptable to eat. One sign that your mayonnaise may have done bad is a change in color. Usually mayo that is spoiled has a brownish-yellow color to it, so you will need to make sure to look for that when trying to determine whether or not you can eat it.