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How to improve your mcdonald's experience
Don't go when the place is busy; the emphasis on fries and other food is speed rather than quality.
You'll have to wait longer, too.
If they are busy, there is no need to ask for fresh fries, estimate how many people are in the drive through and how many are in the lobby.
If it appears to be a large amount your food will be fresh. If you desperately need fresh fries that are hot enough to burn your mouth, request fresh fries.