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Costco employees reveal the 19 worst, grossest, and most bizarre things they've seen on the job

Business Insider Logo By Áine Cain of Business Insider | Slide 1 of 19: • Costco workers shared their stories about the weirdest and worst things they've seen on the job with Business Insider.• Some Costco workers reported that colleagues and members can occasionally make life a bit difficult.• Many Costco employees cited the chain's generous return policy as a source of unexpected situations.Costco jobs aren't always easy. The retail chain isn't just known for selling some rather unexpected products. Sometimes, surprising situations crop up as well. The retail chain did make Glassdoor's list of best places to work in 2017, but that doesn't mean it's immune to odd and frustrating scenarios. Business Insider reached out to Costco employees to find out what strange or bizarre situations they've witnessed on the job. Many of the stories centered in around what one Iowa-based Costco worker called "abuse of Costco's generous return policy." "Oh, the stories we could tell," said one Costco employee from San Diego. "Smelly socks, 20-year-old refrigerators, stained mattresses, we've seen it all." Other anecdotes focused more on bad behavior from members and Costco colleagues. And some stories are just about bad luck or unusual circumstances. A total of 49 employees shared their stories with us. Here's what Costco workers had to say about the most bizarre things they've seen happen in the store:

Costco jobs aren't always easy. The retail chain isn't just known for selling some rather unexpected products.

Sometimes, surprising situations crop up as well. The retail chain did make Glassdoor's list of best places to work in 2017, but that doesn't mean it's immune to odd and frustrating scenarios.

Business Insider reached out to Costco employees to find out what strange or bizarre situations they've witnessed on the job.

Many of the stories centered in around what one Iowa-based Costco worker called "abuse of Costco's generous return policy."

"Oh, the stories we could tell," said one Costco employee from San Diego. "Smelly socks, 20-year-old refrigerators, stained mattresses, we've seen it all."

Other anecdotes focused more on bad behavior from members and Costco colleagues. And some stories are just about bad luck or unusual circumstances. A total of 49 employees shared their stories with us.

Click through the slideshow to see what Costco workers had to say about the most bizarre things they've seen happen in the store

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