4 mistakes you should never make at the grocery store, according to an etiquette expert

According to an etiquette expert, there are a few things you shouldn't do at the grocery store.

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• Business Insider asked an etiquette expert what people should avoid doing at the grocery store.
• She said it's impolite to park a cart in the middle of an aisle while shopping.
• Additionally, customers should always use tongs when picking up loose items in the bakery.

Grocery shopping is a mundane activity that many rush through, leaving some to...