I don’t have that problem. I just head for the self-checkout section.
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They have added another self-checkout area in the Walmart I visit.
Usually can just walk up and begin scanning the products. Time of
day and paydays also contribute to the length of lines.
Don't forget posting days for EBT/SNAP/Food Stamp/Whatever they call it this week payments.
In any event, I've never had to wait at the Walmart grocery; there is sometimes a significant line at the big Walmart, but it moves quickly.